If you can visualize what you would do AFTER you've acquired the information. I don't me getting an 100% on the exam. Something like being a TA for the course next term, teaching it to others. Or as you are going through the course, asking really challenging and probing questions of the Prof. If you can do this, and associate with the feeling of USING this knowledge, then your purpose will be all that more powerful for you.
Sending love to all,
Iam2 
P.S. I was right behind you on that last post Alex. In fact, I thought I had beaten you to the punch. 