How should i Study to improve faster?

I have collected some good books on opening ,middle game and endgames and also has got some 3-4 books on tactics. But i am really confused, i dont know how to start with all of this. I read somewhere that endgames should be study first, i dont know if that was true.

Some experienced player please suggest me with some tips so that i can start my studies. What should i do 1st and next.

And i get really tired and unfocused, what should i do to give my 100% and full concentration.

Do a lot of Tactics. 

do van perlo's endgame tactics. if you study theoretical endgame positions you will get disappointed because you will not get those endgame positions ever.

Do openings in the end please. Don't disappoint yourself at the start. They are so so boring. Hard to understand, harder to remember. 

Tactics and endgames should be done first. 

hum.. Obviously U need at least two solid openings with each side, then practice a lot of tactics and while practicing tactics the endgame will come to you alone :P

First basics,then tactics,middlegames,endings then opening (that too not soo deep)

endgames are logical. i have never been let down by my endgame technique. the tricky part is always always the middlegame. know opening principles but you don't need a grandmaster repertoire.

If you dont know a good opening you would enter in a weird middle game that would get you to a horrible endgame position. For example, opening with b4. That is not a good opening.

Exactly! 

oh thanks that means i should start with the endgames, i have two books on this, pandolfini endgame course and Mark Dvoretsky "chess school of excellence" which would be good to start with?

i have a new tactic book by fred wilson and bruce alberton "303 tatical puzzle"

lol... who are you "quoting"? the highest rated here said "start with tactics"... do w/e you want :)

i am always solving tactics from my new book + 3 tactic which i get in this site for being a member

In my case I study/review opening for an hour middlegame for another hour and so on. When I do that I dont get tired quickly compared to lets say studying endgame or tactics for 3 hours straight.

Good idea.

Based on collected info from players much stronger than myself, 2000+ and titled players, a general consensus wouldn't be far off the following: (based on your rating under 1500)

1 Tactics. Lots of tactics. Generally simpler tactics with repetition over fewer more difficult tactics. My advice, turn off tactics trainer rating and set it to a lower level. (Buy yourself membership here for unlimited tactics on TT. Gold membership is not much or there are other sites like chesstempo.) Simple book tactics are fine though too.

2 Review. Review your own games, with a friend, a stronger player, yourself, a computer etc. Slow games are better. Look for a few mistakes per game and consider sound alternative moves. Make a note of any repeated errors that keep recurring in your games, do you keep hanging pieces? Do you keep losing endgames? etc, etc. Do this with every game.

3 Play through annotated master games. Playing though annotated games will help you in every area, tactics, strategy, openings, endings. Heisman recommends spending no more than 20-40 minute on each game. Another gem is the free software 'Guess the Move'.

4 Basic opening and endgame principles. It is a mistake to spend too much time on openings and endgames, certainly memorising lines or positions that are never or rarely going to come up. But you should think about the principles of development in the opening, and have a knowledge of simple endgame motifs like K + p vs K and basic ideas. The book Logical Chess Move by Move by Chernev is pretty good for general principles of chess.

5 Other. Give yourself a little time to do something else that takes your fancy, watching videos, reading this or that particular book etc. Other 5% perhaps.

This is generally considered the best tried and tested method, along with playing slow games with good players. When you start to get to a higher rating, say 1700, 1800 then other areas of study are likely to be necessary, like more knowledge of opening and endgames. However, do not expect fast results, be content to learn at the pace you learn. Expect to lose lots and lots of games in the process.

sounds interesting i will give it a try, i have started reviewing my games and yes i am expecting lots and lots of lose

download "scid vs pc". that is a chess database. you can download your games and save them all in an archive and open it in that database. is a good tool. and you can use it while playing correspondence chess. :)

what is a database?

how will it be helpful to me?