Hey psycho,
Sorry for reviving a month old thread but I just want you to know that the fact that you're able to get A's while having such a busy life shows me that you're a really smart guy and could do really well in college. When I was in college, I had the same problem because I was really busy coaching and playing for a team, working and studying fulltime. Usually by the end of the day, I am really exhausted and don't feel I have enough energy to think and concentrate. I say the best way to overcome this, especially in a college setting, is to do things more efficiently and manage your time better. A book that I found really helpful in this respect was: How to Study in College by Walter Pauk
Amazon.com: How to Study in College: Books: Walter Pauk
I heard another good book was from Ron Fry.
In terms of procrastination, I usually find that if I go to the local library, a semi-quiet coffee shop or a study carrel at university, I could study much better. Sometimes the trick is to mentally dedicate this zone strictly as your study only area.
I also agree with sillicon where the more practice you have, the better you will be. It may be a hard and slow process but you will definitely see results.
I have been a tutor for the past 5 years, if you need any advice in terms of studying for college and whatnot, please don't hesitate to PM me.