I would start by looking up the exam (or exams) that are offered for SQL Server (good start: http://technet.microsoft.com/en-us/sqls ... 31757.aspx
). Study the book thoroughly, Microsoft is very particular about their exams in that you can only use a MS solution to solve the problem. Then dig around the internet for test examples or "brain dumps". I found that flash cards for the specific exam work great.
Another study tip: for practice exams study the answers before taking the test, this is to train your brain to remember the right answers and not the wrong ones.
The fact that MS has changed their tests to be more situational and less multiple choice should play in your favor because you have 5 years experience.