I am a big fan of Danny Gregory's Everyday Matters art blog. Each week the EDM Yahoo Group has a sketch challenge, and if you want to draw and share, you can.
I never have attempted it before, but I finally made myself. Below is a skecth with watercolor of my Dad's picture frame. It really doesn't look much like him, in fact, I think it looks more like Adam West. I really should have spent more time on it.
Still, it is a big step for me to do the challenge, and even bigger to post it. The next challenge is "Car" so we'll see about that one.