Anyone with forty minutes to spare might want to try going through this psychological survey for my old uni colleague JayVee. It's not exactly a fascinating experience, but by completing it, you'll be helping out at least one charity (even if that might implicitly entail shafting two others). Plus, you can do the same thing I do every time Dr L gives me something along these lines, and try to discern exactly what the designers are trying to prove.
Update: Thanks to Chuck for pointing out my link was faulty. I blame this morning's ice-related head trauma.