I've also taken to doing daily quick drawings from photos at Quickposes - a nifty gadget that throws photos at you and you draw them at top speed - you can choose to do 10, 20, 30 etc images, with intervals from 30 seconds to 2 minutes. (I haven't dared to try the 30 second option yet!) and is set up to encourage you to do at least 30 mins a day.
Using my new skills, I drew a Thorin. It did take me more than 2 minutes, but probably not more than half an hour, and it was drawn straight in ink - no pencil lines at all. Yay, I am learning things!