Hi! I am an "A" student-usually
! What has really helped me is to keep up with the reading. It's time consuming, but in-class lecture makes much more sense and I can just highlight and use marginal notes off of my reading notes.
I usually spend about 2 hrs a day studying, and I devote different days to studying different subjects-just so I can keep them clear in my head. I also make a lot of 3x5 cards for quick reference and to take with me, so if I have a minute I can pull them out anywhere I am at and study. ( I work as a unit secretary, and when things are slow, I discretely pull out my cards and study, study, study.)
Good luck to you-I am 30 and am back in school and it's been an adjustment, but really wonderful, too.