This is my observation from the 2005 exams

Self study is the best way to attack, I find the courses not too useful

Grab some test exams (Pass4Sure, TestKing, ExamCollection)... google as well

Just go do the exam with free 2nd shot chance

70-431 was easy

I have heard

70-444 is easy

70-443 is the most difficult of all

Problem for 2008 certifications is that there aren't a lot of resources out there yet to utilize, even the books aren't out!