Best way to incorporate flashcards?

I'm writing the MCAT in August. Using Kaplan books, Khan Academy videos, and rebopbebop flashcards. I have the books and videos planned using StudySchedule, but I'm wondering what the best way to use the cards is? Right now, I find that I start a set for a chapter 24h after I read it. But how often should I be doing a set of cards/chapter, especially since sets will build up as I read more chapters?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: MCAT: Medical College Admissions Test Source Type: forums