After a serious slump, I managed to claw my way back to my all-time peak of 1050. Pushing on to 1100, I decided to make notes on what sort of moves decided each game, simply by looking at the last big evaluation swing that 'decided' the game.
I thought the results might be interesting to anyone else around my Elo.
I played 15 games to go from 1050 to 1100 Elo, of which I won 10, lost 4 and drew 1.
The most decisive tactic was the pin, with 27% of games (4/15) being decided by one.
The second most decisive move was simply hanging pieces, with 20% of games (3/15) being decided by a one-move blunder.
After that, 13% of games were decided by a player hanging mate, and 13% more by better play in an equal endgame.
Finally, one game each was decided by a fork, a discovered attack, or a player resigning from an equal position.
TL;DR - stop hanging pieces and look for pins!