Hmm.... Well why don't you try braking it up. Try studing some, then draw as a reward. You could try studying for a certian amount of time, then drawing for the amount of time you drew. If you have a timer to set it makes it alot easier to keep track of how long you have been drawing, so that you don't spend more time drawing than studying. If you just cant put down the pencil when it goes off put town the time, finish the part you were working on, then take down the time and find the difference. Then just add it onto how much longer you should study the next time. I hope this helps. -^-^-
Sorry if this is posted too late for you to use.