In slow games, I write down my move, then blunder check it, then make the move. That forces me to remember to blunder check on every move. I guess that's what I'm missing in faster time controls.

I'm thinking maybe it's just a habit thing. If I force myself to blunder check every move in slow games, and try to force myself to do the same thing when looking at chess puzzles or other study positions, then maybe I'll get in the habit of blunder checking every time. That way, I'll be so used to it that I'll do it instinctively every time, even in blitz.

--Fromper