Too much to think about

I know that during class, especially ballet, that I need to think of a lot of different things at once. For example just at bar with the plie combo I have to constantly remind myself to turnout from my inner thighs, keep my shoulders down, widen my back and try not to hyperextend my knees. At times I think that I should just focus at two or three things at a time, but then I get corrected for the one thing I'm not thinking about. Then I change my list of things I'm going to think about and get corrected again. I know that my dancing is improving, but I feel like some days are two steps back from the day before. I feel more confident about correcting most of my habbits at the bar than in center. I try my hardest to keep turning out with my inner thighs but then I feel my balance is off and then my inner thighs stop ingaging. After getting my ballet midterm notes I got a pretty good idea of the big problems I should work on for the rest of this quarter and perhaps the rest of my life.