After comparing extra testing materials available, I am still torn between CLEP books and online practice tests. Should I use both? Books seem to be more expensive initially, but slightly less expensive overall. Meanwhile, InstaCert and SpeedyPrep are less expensive initially, but only slightly expensive as time goes on (based on 6 month IC membership). I love practice tests, but if I buy 3-4 major 2009 CLEP books plus some textbooks, I'll have enough practice tests to choke a pony. I could also do both, but I'm not sure if I'd actually get any extra benefit out of having both. What are your preferences for studying? What are your experiences in this area? Thanks! You are all awesome!