I will respond to the more general question of "How do you do well in college classes?"
This might be a bit of strange advice but I would make sure all your "outside of school" stuff is in check before the semester starts. Organization is my main goal before the semester starts. Things like clothes, folders (for school and real life stuff), computer files/folders, cooking ware, car and bike are all cleaned and in working order.
For instance, I just reorganized my closet because it was getting messy. Now instead of fishing through a bunch of clothes looking for that one shirt I like, that seemed to disappear over the last few weeks, I know exactly where it is and it will either be worn, washed, or in it's designated spot all semester. That's one less thing to worry about.
I make my bed everyday too. Haha, I know that sounds very parent like but when I come home to a clean, organized house (dorm for you?) then I can think about what the heck my physics teacher was talking about instead of "oh crap, I should probably pick up some clothes or do some dishes."
There are some great tips on:
http://calnewport.com/blog/
The best advice, for me, I got from that site was timed "To-Do" lists. Write down the estimated time for each item. Doing this maximizes my time and I'm far more productive especially when I have a mini break of 5-10 minutes.
Good luck.