If it is easy then everyone would do it!
One of the most common questions I get is what to do when players hit their plateau and their ratings get stagnated.
The answer is quite simple. Every player, including Magnus Carlsen, has weaknesses. There are areas in the game they are less good at or feel extremely uncomfortable with. As a coach, it is my job to detect those weaknesses and lay out a concrete plan to fix every single one of these weaknesses.
Then it is up to the players to follow the improvement plans. But it is easier said than done. Some were willing to change and they made big improvements such as Wesley So, Ray Robson, Jorge Cori, etc. Some made some changes but not all.
However, some are so attached to their meaningless rating points so they resist change because they are simply afraid to get out of their comfort zones. Changes can mean loss of rating points for a short period of time.
But insanity is doing the same thing over and over again and expecting different results!
To continue to improve, one must be willing to fix weaknesses while continuing to improve on current strengths. There may be some temporary setbacks but at the end, this is what it will take to get over the hump to get to the next level!