What (if any) textbook you use can also be important. For a good bunch of my math years (just finished my last math course this Christmas) I used mainly the book for learning math. We had a great one where two and two pages went together to each form a sub-chapter, 8-13-ish of these per chapter, each sub-chapter:
1) explaining the sub-problem relating to the chapter,
2) presenting it mathematically,
3) providing a few examples, and
4) providing 8-ish tasks that needed the math the two pages taught us.
If I'd been absentminded in class or forgotten it all for lack of doing my homework, I'd open it, read a task, read through a similar-seeming example, and use that to do the tasks. Bam. Worked well for intense studying the one or two days preceding a test, and as long as the math continued to build upon that knowledge, it'd stay. (If unused after that, though, it would've disappeared pretty fast, I expect.)
So if you have a good math text book, make sure you at least try to use it.