Need Help!!!
That's why you should sit on your hands. The act of tipping up your butt and sliding your hands out to move a piece gives you a physical reminder to make one last blunder-check before moving.
In the words of Emmanuel Lasker (World Chess Champion for 28 years) "When you find a good move, look for a better one" ![]()
In short time controls, always calculate forcing variations. Maybe warm up with some tactics to get in the right frame of mind.
In longer time controls, you do this too, but remember to always make your move a choice. This means at least 2 candidate moves, and you choose between them... in other words don't spend all your time convincing yourself of just 1 move. This is basically Lasker's advice (always look for another move).
So, you know, maybe you're reviewing your game, and there's something you missed. Ask yourself what your candidate moves were... if you didn't even have the computer's move as a candidate, ask yourself why not.
(Of course... sometimes computer moves are crazy, but other times you should have thought of it)