Read one or more of the following (if possible)
"Common Sense In Chess" by Dr Lasker
"My Chess Career" and "Chess Fundamentals" by JRR Capablanca
"Logical Chess Move by Move" and "The Most Instructive Games of Chess Ever Played" both by Irving Chernev
1000 Checkmates and 1000 Winning Combinations both by Fred Reinfleld.
Start doing the Tactics Trainer here 3x/wk and in between start reading beginners articles I'm sure there's tons of 'em here.
Check out my endgame blogs start with K+P vs K and work your way up http://blog.chess.com/RoboRoy
I have a rating of about 1100. My online rating is quite overated. I have this problem i have been on chess.com for 6 months. But I cannot seem to crack past the 1300 mark i only play 15/10 games so i dont really blunder except for my mouse dropping short ocassionally. I am coming up to my first individual OTB tournament and was wondering how I could improve being only 13 I have plenty of time but I want to improve no matter what it takes my goal is 1500 by next christmas.
Any help would be greatly appreciated