I'd think you should analyze your games and keep working on it. More games you lose there's more to learn. I'm quite low in ratings, so keep that in mind as well before listening to me
Today I got to 899 and screwed everything up and got to 800 at the end of the day, any SUGGESTIONS

My suggestion is take a good coach. In India we have many good ones available at a reasonable price. The coach provides you a structure and priority on where are your strengths & weaknesses. Which books you should study at your level. Once a week class plus investment of time during the week to study, helps a lot in improving your rating. (I was once at 627).
THANKS

Not every day is the same. Some days, your brain is sharp and you can do well at chess. Other days, you might be experiencing a bit of stress or maybe you're simply a bit tired.
Play a lot of games. Choose one opening and practice. It's best to choose a simple opening. Just practice how the opening works. Learn the opening for white and black (black should be the mirror image if the opening is simple). Watch how various opponents respond.
Learning one opening will teach you discipline, patience, the cost of making a bad move, and how to use the opening so you will put the opponent in an impossible position. Don't worry too much if you run into players who crush you. All the variations of your opening will come to you in time.
When you finally understand all the in's and out's of the opening and how to vary your moves if the opponent puts up a good defense, you will find that you have attained a vast array of knowledge and skill. At that point, you will see your rating go up.
Then, when you can hold a new 100 point increase fairly well, it's time to learn another opening and also the various ways an opponent can build a defense.
Chess requires practice. It's no good to fill your mind with a bunch of knowledge about technique until you have played many games with that first opening you chose.

https://www.chess.com/forum/view/general/why-is-my-rating-dropping
This forum may be useful to you; but in short, rating swings for everyone just because of the nature of the system. If it helps, you may want to utilize some sort of stop-loss system to make sure you are playing clear headed and not "on tilt" ("stop-loss" is where you stop for the day [or session] if your rating drops x-amount to prevent huge drops in rating quickly, so you can come back another time when you are more focused and playing your A-game chess).

p.s. Rating swings (especially drops) still happen to anyone and everyone though. I just dropped over 100 points really recently too (although I got about 20 points back today and 20 the night before, but it is still a long climb back; losing rating is easier than gaining it xD).

Do tactics tactics and more tactics. They will come up in your games and you will win alot more. Don't focus on positional chess (apart from the basics like develop your pieces,get a good centre and get your king safe) or learning a bunch of theory.

But also keep in mind that there are alot of ways to improve at chess. Learning opening traps could get you quick and easy wins. Generaally, don't play too many games without going over them, and follow the mantra study,play,study,play

Yep I just recently put on over 100 points to reach an all time (for me) blitz high of 1135, then in the following two days lost over 200 points before getting a few back to finish in the high 900s, which is where I remain and no doubt where I belong. It can be so viscerally frustrating to lose in this lowly 900-1000s area, particularly as I've been playing for 10 years, taken all the advice to do LOTS of tactics, and I'm good at tactics: 2033 on tactics here, 1600 blitz tactics on chesstempo, 1800 on endgames. I blunder at times, of course, but often it seems as these other 1000 players are so positionally adept as as to steamroll into my side of the board and win by force: often they very quickly find sequences of solid moves - can feel like I'm playing 2000s!

Just do LOTS of tactics.....
Try and get it above 2000 in any site, {lichess or chess.com or chesstempo]

Tactics, lessons, puzzle rush should get you there. If you need, play some bots to get your rating back up.

Just do LOTS of tactics.....
Try and get it above 2000 in any site, {lichess or chess.com or chesstempo]
Perhaps. Tactics are important, but I don't know about 2000+ tactics rating as a good goal for everyone. Personally, my current tactics rating is 2000+ on several chess sites: but I also want to point out that tactics ratings are more inflated on some chess sites compared to others.
I'm not going to mention other sites by name (against chess.com policies for the public forums and it is not important to the point I am making), but 2000 tactics rating on chess.com may not be the same skill level as 2000 tactics rating on another site(s).
I think tactics are helpful and have their place, but I'm not so sure about the arbitrary 2000 number.

Hey, there's a lot of advice to give, but I think the most important one for you is to not care about your rating. Too many people starting out chess care too much which leads them to try to optimize strategies that prevent them from losing too much. That's not a good way of thinking. Instead of trying to optimize rating, try to optimize your chess skills! That is the only sureway way to get your rating up and beyond your highest of highs.
If you have any specific questions, make sure to ask, I'll be happy to answer.

Hey, there's a lot of advice to give, but I think the most important one for you is to not care about your rating. Too many people starting out chess care too much which leads them to try to optimize strategies that prevent them from losing too much. That's not a good way of thinking. Instead of trying to optimize rating, try to optimize your chess skills! That is the only sureway way to get your rating up and beyond your highest of highs.
If you have any specific questions, make sure to ask, I'll be happy to answer.
That is an excelent advice! Thank you.

Hey, there's a lot of advice to give, but I think the most important one for you is to not care about your rating. Too many people starting out chess care too much which leads them to try to optimize strategies that prevent them from losing too much. That's not a good way of thinking. Instead of trying to optimize rating, try to optimize your chess skills! That is the only sureway way to get your rating up and beyond your highest of highs.
If you have any specific questions, make sure to ask, I'll be happy to answer.
Sneakiest_Of_Snakes thank you :-) - I will really try to take this advice!
One question I have (and probably many others in the 1000-range), on reviewing my games on the chess.com analysis feature, often a suggested early move is to pin an opponent's Knight (i.e. Bf3/Bf6 or Bc3/Bc6). I often think what's the point, when either the opponent can just kick your Bishop back with his h/a pawn, or then if you take the Knight, he just replaces it with a Queen or Bishop, developing a piece at the expense of your already-developed Bishop?

Hey, there's a lot of advice to give, but I think the most important one for you is to not care about your rating. Too many people starting out chess care too much which leads them to try to optimize strategies that prevent them from losing too much. That's not a good way of thinking. Instead of trying to optimize rating, try to optimize your chess skills! That is the only sureway way to get your rating up and beyond your highest of highs.
If you have any specific questions, make sure to ask, I'll be happy to answer.
Sneakiest_Of_Snakes thank you :-) - I will really try to take this advice!
One question I have (and probably many others in the 1000-range), on reviewing my games on the chess.com analysis feature, often a suggested early move is to pin an opponent's Knight (i.e. Bf3/Bf6 or Bc3/Bc6). I often think what's the point, when either the opponent can just kick your Bishop back with his h/a pawn, or then if you take the Knight, he just replaces it with a Queen or Bishop, developing a piece at the expense of your already-developed Bishop?
I was confused where the question was, but you seem to have written it in the quoted part .
Anyways, the simple answer to that, is that in openings where you bring out the bishop early to attack the knight (like the Ruy Lopez) isn't necessarily done to "attack the knight", but moreso used to pressure the pawn the knight is defending.
In the above position, the bishop is attacking the knight, which is defending the pawn. Sure, it isn't threatening the pawn right now (as Bxc6 dxc6 Nxe5 is met with Qd4), it pressures the pawn on e5 indirectly and if black isn't careful it can be lost.
However, if you're 1000 ratedish, then it's okay to ignore the computer recommendations as openings like the Italian Defence where the bishop is developed to c4 is just as good as the Ruy Lopez as it is simpler.

Being a Ruy Lopez player often I've played against this as Black too and used the Qd4 trick fairly often. But just today I played a game where the computer recommended pinning the Knight on f3 with my Bishop, where there was no pawn to protect - it would seem vulnerable all the way out there on g4 when a tempo would be wasted when it gets kicked back to my own side. And if I took the f3 Knight, it would aid the development of his Queen to f3, a great position for it, no?
(as you can see, the move I played was Be7)
Hey, I think there are many people like me who play hard to push their rank, and sometimes they do get 100 points in a single day but then happens a series of unfortunate events and then they go back where they belonged. So I think you should share your ideas, experiences, thoughts anything you think is good, OH sorry not good but funny.