I have been able to keep on task, more or less...by collecting art which inspires me, but a better, more recent remedy has been to buy many Audio Books. Listening to these cool stories as I sculpt and draw has made my work time more enjoyable.
If you are interested in collecting Audio Books, I recommend Audible. You can get some very good deal if you become a Monthly Subscriber. I got Stephen King's IT, which is a 40 hour long book, for $7, at my 3 month intro cost. The regular monthly membership is only $14. You may enjoy their library, there are thousands of titles, all of which are offered at a nice discount for Gold Members.
So here I am, listening to Sci-Fi and Horror stories, and sculpting my little Robots and Monsters...lol.
Fun, fun, fun!