I know this isn't for everybody, but getting into the DIY side of music electronics really motivated me to play more. Playing through a pedal or an amp that you built yourself is a real kick and prompts a lot of additional playing to find all the new & different sounds that you can produce.
DVM's Ever-Expanding Gear List:
Guitars - W-A-A-A-Y-Y too many to list. Check 'em all out HERE