How to go from rating 1000 to 1200 (2/1)

I have been playing for about three years. At first I studied a bit of opening, middle and end game strategy and watched videos of classic games of GMs as well as a few live ones on here. Actually this is my second account but on the first one as well I settled around 900-1000 on 2/1. 2/1 is my favourite time to play. My question is what is the difference between someone ranking 1000 and someone ranked 1200 and how do you suggest to bridge that gap?

Tactics and concentration only. Do 50 tactics problems daily for a few weeks and you will get there.

Thanks, good advice.

From your profile you play exclusively fast time controls.  That’s ok if you’re playing chess primarily for fun, and where your results are secondary.  But you are unlikely to improve significantly doing this; by playing fast time controls you have little time to think about what you should be doing.  If you’re seriously committed to improving, then I suggest that you...

1. Play longer time controls - a higher percentage of your games should be at the longest possible time controls, including daily chess...so you have time to think about what you should be doing...
https://www.chess.com/article/view/longer-time-controls-are-more-instructive
https://www.chess.com/forum/view/general/how-blitz-and-bullet-rotted-my-brain-don-t-let-it-rot-yours

2. Maximize The Usefulness of Your Moves....start to incorporate ideas like these in your play...
http://www.mark-weeks.com/aboutcom/aa06b18.htm

3. Study the game - learn what you should be doing.....
Good Chess Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond