I encourage all of you to get in the habit of having and using a sketchbook. This shouldn't have to be a required class element for you to be motivated to work on your craft. James Jean is an illustrator with a great website and blog. Recently he posted a bunch of new entries from his sketchbooks. Check them out...
(website) http://www.jamesjean.com/
(sketchbook) http://www.jamesjean.com/sketch/
