How should I improve my game?

I can beat 1500-1600 players, sometimes 1700-1800 players and have defeated only two 1900 (because they severely blundered). How should I improve my game? How to make it 2200+

Chess960 is a good option to improve positional chess.

@NativeLizard

1) learn from your mistakes
2) do more puzzles than games
3) play rapid and classical
4) donnot concentrate much on openings
5) play chess with yourself without favoring any particular side
6) do not only believe in engines
7) think for a plan , later look for executing it
8) think why your opponent moves that particular move
9) dont resign on blunders , strive hard to win it
10 ) dont be over confident seeing weaker opponents

" there is no shortcut for any thing , practice makes a man perfect "

Skip the ultra bullet for a while and focus on tactics and longer games

1 Thought process
2 Tactics
3 Analysis
4 Training program

I beated a 2250 player today @MrCalderon @NativeLizard @Sholmes49 @Timegod @Timegod