Thanks so much for the quick responses and kindness, you guys--I really appreciate it!!Good ideas... and I really relate to that sort of procrastination.

Although the "list method" has never worked too well in the past, I don't think I've given it the real trial run I should have. Maybe it'll work if I REALLY give it a try. I do have an assignment book, and that does help me some.
My ADD seems to be really really mild, though, and seems sort of... specific. For instance, I can memorize every line, entrance and stage direction for a lead character in a play and I can remember minute details from books I enjoy, but I can't force myself to do history homework even though I KNOW exactly how to do it, and how easy it would be if I just applied myself. Studying seems impossible because I've no set goal in mind, and my concentration on quizzes and tests has just been getting worse.
I guess my real question is whether some of those "other issues" might be playing a greater role in this (like fear and zero self-esteem). Have any of you ever found this to be the case? I mean, from my understanding therapy in general is meant to change netagive patterns of thought if needed... right?
Oh, and I've tried medication... Wellbutrin XL, first 150, then 300 mg. Neither made a significant impact on me other than leveling out my emotions (300 mg a bit too much). I know you have to try different things to figure out what works, so... maybe.