Rapid vs Slow
I like to play rapid 5 min games. It is dynamic and full of blunders. People get stressed when time runs out and you can try a bunch of openings in a short period of time.
The slower games are also great to play. But you need more patience. That is a problem. I tend to speed up when i think i'm winning, or when i think there is only one move. Like it is forced.
Better try learning to concentrate and focus.