Here's another tip. Maybe one that... half the people should know? Not sure.
Concerning rooks, If you have to defend a pawn, something like a weak backward pawn, then your rooks often prefer to defend from the side. This sidesteps any pins.
An example of exploiting a common type of pin below.
If white's rooks defend from the side then the pawn would be safe.
3 minute games once again remind me of tips.
More about races.
Two tips in one game.
"Never race a pawn" and
The player ahead on captures gets to choose when to retreat.
(The previous tip was to remove your opponent's threat with the biggest threat you can make. Retreating technically falls under this category, but since retreats are not often thought of as threats, and since this is a very common idea, I feel like it deserves its own mention)
Dances like this, to position the queen behind the bishop, are common and worth remembering.
(Black achieves his desired setup after 21...Bh3)
Understand what the purpose is behind your moves within a game.I know you said only one tip but i would be doing you and many others a disservice if i did not mention this tip,learn from your losses.Losses are more beneficial then wins.
Game in #106 reminds me of a tip for lower rated players.
Everything else being equal, if you can leave your pawns abreast in the center, then do so.
Advancing either pawn will leave you weak on a color. Leaving them abreast also puts more pressure on your opponent, and especially when they capture in the opening, you'll get to bring one of your pieces to the center for free.
Here's... sort of a tip? I guess at the end I'll make it a tip or two (edit, tl;dr, both tips in bold below).
This one is about sacrificing near the opponent's king to attack.
First lets look at the basic formation
Notice how many options there are. If someone is pressuring you on the g file, you can just move the g pawn. H file? Same thing.
Fianchettoed queenside bishop? You can move the f pawn. Other colored bishop? You can move the g pawn.
Pawn like this can block against every different line to the king.
Ok, that's obvious. You knew that, or at least you knew it intuitively. Now the tip.
How can you instantly make it so they can't block even one line? Easy. Remove the g pawn.
These are both fairly common sacrifices, and even though they happen on different squares, they serve the same function: to remove the g pawn.
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Now a quick and dirty tip for defense (I say quick and dirty because in real sacrificial attacks, defensive ideas aren't always so simple, and you have to calculate).
If you could "repair" this defect with a minor piece, how do you think you'd do it?
With a bishop to replace the missing pawn? But the bishop would not be defended by a pawn, and can't move forwards as a pawn could. It's just not the same.
A bishop on g3/g6? Maybe. But with friendly pawns blocking it, it sometimes runs out of squares.
A fairly comfortable way to "repair" it, IMO somewhat often, is with a knight.
Unless you're being utterly demolished, attacking ideas usually depend on a key line, color complex, or even square. (Vukovic calls these focal points)
If you can shut down that line, shore up that weak color, or manage to protect that square, you can blunt the attack.
That's sort of basic attacking theory, and why I think the above tips may be useful even if I'm not showing an actual attacking position from a game 
When you sac to remove the g pawn, you'll very likely have line (file, diagonal) or color complex (white/black) in mind to aim everything at. Sometimes putting a knight on g3/g6 helps defend.
Step one - play
Step two - ...
Step three - win
If u do not win u need to work on the ...
Here are a couple of more examples of always looking at checks first wheen trying to solve a tactic/puzzle
another example of looking at checks first when trying to solve a tactic/puzzle:
Make sure you are high, or at least drunk as f***. Works great when solving tactics.
It's actually the one I use almost every day
In the spirit of the funny tips...
except I'm not really joking...
If any non-titled player says something about "the two bishops" when giving an evaluation or strategic assessment then they're full of crap. I don't just mean beginners, I mean 2100 players.
Only in a rare few types of mid-game positions will non-titled players actually be able to see, and know how correctly to make use of, the bishop pair.
But @ponz111, after cxb7+ the queen can take the free bishop. Please correct the position thank you
In the spirit of the funny tips...
except I'm not really joking...
If any non-titled player says something about "the two bishops" when giving an evaluation or strategic assessment then they're full of crap. I don't just mean beginners, I mean 2100 players.
Only in a rare few types of mid-game positions will non-titled players actually be able to see, and know how correctly to make use of, the bishop pair.
I agree with almost all of your posts godsofhell!! but I cant agree with this one.
The bishop pair is a pretty obvious advantage and it should be clear how to maximize its benefits. When you have the bishop pair you will have one very strong bishop that is unopposed and your focus should be inducing and exploiting weaknesses on that color. Also you are much more likely to be able to trade down into a B vs N endgame, if you can trade down into an endgame with pawns on both sides of the board with B vs N then this should also be a reasonably straightforward advantage as the N will struggle to compete with the bishop playing on both sides of the board.
That being said, this game is one of my favorite games of all time in which Ivanchuk happily gifted Kasparov the bishop pair vs the knight pair and then pummeled poor Garry into oblivion. But this is just alien chess straight from planet Chucky. http://www.chessgames.com/perl/chessgame?gid=1060207&kpage=6
In the spirit of the funny tips...
except I'm not really joking...
If any non-titled player says something about "the two bishops" when giving an evaluation or strategic assessment then they're full of crap. I don't just mean beginners, I mean 2100 players.
Only in a rare few types of mid-game positions will non-titled players actually be able to see, and know how correctly to make use of, the bishop pair.
I agree with almost all of your posts godsofhell!! but I cant agree with this one.
The bishop pair is a pretty obvious advantage and it should be clear how to maximize its benefits. When you have the bishop pair you will have one very strong bishop that is unopposed and your focus should be inducing and exploiting weaknesses on that color. Also you are much more likely to be able to trade down into a B vs N endgame, if you can trade down into an endgame with pawns on both sides of the board with B vs N then this should also be a reasonably straightforward advantage as the N will struggle to compete with the bishop playing on both sides of the board.
Well, it is a little funny... I'm saying don't trust anyone under 22-2300 on this subject, and I'm not there myself... so in some sense my advice is to not trust my advice
But honestly, with the bishop pair, there are many exception in the middlegame... just look how often BxN is played right out of the opening.
In an endgame, on an open board, ok, I think non-titled players can see the bishop pair and actually try to make use of the advantage.
In the middlegame I hear people mention it when it doesn't even make sense... then 3 moves later they trade off one of the bishops for no reason and don't even mention it as if it were a loss.
I think they mostly say it because they know it's supposed to matter, but they don't actually see it in the position, and they're unable to actually exploit it.
Here's a position that has two patterns that are telling black he needs to move his knight on f6. Either one is enough on its own, but I thought it'd be fun to show a position that has both.
Nd7 is very logical.
When on f6, there are two miserable pieces in black's position. The first one is the knight itself. White's main pawn chain (in particular the f3 pawn) is taking away all the knight's advanced squares. The knight definitely wants to relocate given a chance.
The other miserable piece is the g7 bishop. Sure it's potentially good, but not as long as there's a knight blocking it. In many fianchetto positions a knight on the 3rd rank (or for black the 6th rank) has a high priority to relocate.
(A small note, a knight on the 4th/5th blocking a finachettoed bishop is not so bad as it's a knight in the center, and if the bishop is helping cement it there, it's often content enough and isn't shouting at the pony to move).
Yeah, sure that Nd7 is pretty logical. Might as well be maneuvering around to Nb6. But what about the Bxg7 after Nd7? It’ll be a check later on.
I don't know. The position is theory. Black also plays a5 in that position, and then Nd7.
At a glance I assume black welcome Bxg7 because white would weaken his dark squares.
And just in general when one of your pieces is terrible you don't want to trade until you've made it better, and white's bishop on e2 is really sad right now.