Here, let me give you a Hand...

I was confusing metacarpals and metatarsals during my studying session this morning and since I am a visual person, I came up with the following solution:

Granted I probably shouldn't label my entire body {I sure as hell will not be allowed to take any tests in such a state} but this does help me remember in the long run.
I did consider taking a photocopy of my hand and then labeling the picture but I did not want to use the copy machine at that moment. I later found a suitable picture online and printed it for labeling.

Anywho, back to studying!

Metatarsals are in your feet, by the way. :)