Not to be trite, but study and practice. I have a blog post where I talk about my experience and preparation for taking this test. I took and passed the test 2 weeks ago.
You can see the notes about the exam at the Microsoft Learning site for the test
Jack Corbett
Consultant - Straight Path Solutions
Check out these links on how to get faster and more accurate answers:
Forum Etiquette: How to post data/code on a forum to get the best help
Need an Answer? Actually, No ... You Need a Question