I've been participating in an on-line 'scavenger hunt' where we're given 26 items to sketch in 9 days, and subject challenges where one draws the same thing for a month. Here are a few of my favorites:
I've been trying to do a small ( 5x7" ) painting a day, working on trying to see the world as a painter rather than a sculptor. Also working on trying to push these things out faster. Not sure its working on either front. Here are a few: