Whenever I'm feeling a bit blah in my drawing skills, I bip over to deviantART, an online art gallery. Anyone with half a brain cell and a computer can upload stuff, often random, sometimes impressive. Browsing through it is good for times when most of my attention has to be diverted elsewhere (like listening to NPR.) There's nothing quite as effective for improving my own artistic attempts as looking through the work of better artist...which...is practically everyone.
I found this one the other day, and it gave me the chuckles.
It can be found at http://nocturnal-devil(dot)deviantart(dot)com