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You gotta have something to lose if it's taking you so much willpower to get this started
Try beeminder or stickk
Make a 'contract' like, 'here's $50, if by next month I dont have a sketchbook full of studies, give it to some charity/cause I hate'
Or announce a posting schedule on your blog, so that you stick to it out of fear of embarassment. that worked quite well from me even when I only had 20 followers.
another big point is make sure that you aren't resisting the temptation to procrastinate. meaning, make it impossible to procrastinate, or at least very inconvenient. get your books, references, whatever, then turn the internet off. get one of those time-locked containers and put your phone, console controller, whatever in there.
there is a huge difference between "could" and "cant'" procrastinate.