might as well kill two birds with one stone and learn some scales/chord (arpeggio) shapes.
look up fingerings for:
The Major Scale
The Minor Scale
The Blues Scale (you only use the pinky once here though)
You can also look up fingerings for the modes:
http://en.wikipedia.org/wiki/Musical_mode
Learn to play the arpeggios for Major, Major6, Major7, Minor ext...
Active Bass has a real good scale and arpeggio finding tool that will show you how to play all of the things I mentioned.