Point being, there are concepts and strategies and tactics that are important for every chessplayer. But there are also probably three or four things that are critical for YOU – because these things will help you avoid your most characteristic errors.
Here are mine, at this point in time:
1. Watch that endgame transition. I can stop lashing out now and start thinking about things like “do not hurry”, and centralizing your king. I’ve gotten better at this.
2. Nuke the knights. They will only cause me heartache in the late middlegame.
3. Do NOT get Happy Feet. After decades of ALWAYS having a bad opening and a bad position, and then a decade of working to fix that problem, I’ve partially fixed it. Which gives me the novel sensation of occasionally outplaying someone and getting a solid positional advantage. Which leads to sitting around thinking “I’m killing this guy!” and “My position is so good!” (That’s Happy Feet.) Which leads to making stupid blunders which leads to bad positions again. I will not get happy feet I will not get happy feet I will not get happy feet I will not get happy feet.
What are your particular keys to success?