I've been checking out a lot of stuff by Nathan Fowkes also lately. I practical love everything that guy does. Anyway he always does a painting every day. He does these amazing landscape pieces that are ultra small Most are less than 3x5". So I started doing a painting a day. Another challenge also he put in his blog is to do a landscape in 20 strokes are less so I've been attempting that also...it's tough!
Think you can learn a lot from it though. Anywho here are four I did, I got a couple dozen more also I'll get photos of eventually. But yeah if you don't know Nathan's work then you need to go to his blog pronto! http://nathanfowkes.blogspot.com/