"Make sure you have something to show for the work you've done - an essay, a timeline, a chart, whatever it is you're studying. That might make you feel as if you've actually accomplished something"
My advice would be. Whatever time you have utilize it and as the above advice suggests (read the yahoo answer), make a pictorial timeline of what you are going to achieve out of whatever time is left, and how many hours you'll be spending, and be content with the limitations you have.
I know human is boundless and all that BS but realistically, if you have not reached that BS (Genius) state, be realistic. How to achieve that state is another mystery.
Just have a <button>button</button> in your hand.