The dental kit is nifty for anyone, becuase a lot of the stuff in it you generally aren't going to find as easily or in small bulk.

The blister kit might not be a bad idea for those of us who work in offices- 50 minutes by train, 14 hours by foot, yeah, you're going to have hot spots.

And the pocket medic is a natural budy for the PSP. Same size, slip one into each side of a jacket, and you are mostly set.