Only do these things: Playing Games, Analyzing Games, Basic Opening Study, and Tactics.
Playing games: play slow games, NOT BLITZ OR BULLET. 60|0 or 45|45 is best.
Analyzing games: Annotate your own games providing variations and commantary, WITHOUT A COMPUTER.
Opening Study: After each game, review it in a database to see where you should have played differently. dont spend more then about 10 mins a game.
Tactics: spend at least 30 mins a study session doing tactics. I reccomend Chesstempo.com
ALSO: play in as many Rated Tournaments as you can. Icc is good for this.
BONUS: If you have someone to help you (family member, close friend) practice BLINDFOLD CHESS.
Hello. I'm a 13 year old beginner and I'm wondering how I can improve. Thanks!