So I feel I am at a point where I've studied about all I can to prep for the 70-640... but somehow I just don't feel ready. I do think I know the material, I've gotten good marks on my prep exams and sims, I have mastered about 200 flash cards of basic material.
I just don't feel I am ready. Call it nerves or what you want but I've got a sinking feeling about taking the test.

So... How do you guys know when you're ready? Is there a point you hit with a confidence level? Is there a particular set of practice tests you like that once you pass them you take the real exam?
Any advice or experience is welcome! I'd love to hear from experienced test takers.