I do too!! I think about all the things that mightve pissed me off, all the things I said I would do and didn't..all the things I did, everyone I spoke to..and by the time I go to sleep, I dream something crazy!
Mostly stuff about my day, what happened, what I thought should have happened, all of that stuff. Sometimes I'll think about what I have to do the next day, but I really don't have too much running through my head on most nights.
I think about everything that has happened that day, what I have to do the next day and sometimes I even think about many other things- till I drift off to sleep. It like rewinding a tape and reviewing lol.