Why do I always do this?!

This seems to be something that I constantly struggle with. No matter how determined I am to never let this problem repeat itself, I continually find myself, only hours before a paper is due, frantically struggling to finish is. I never wonder why I receive slightly lower grades than I would like on papers, I know. I just don't put enough time into them. And even though I know this, I still can't manage to get them done earlier. So here I sit, writing a 10 page paper on Measure for Measure and it critique on marriage in the 1600's and I still have roughly 3 pages and a quick revision before I turn it in at 11:30. Silly silly me. I need to stop doing this!!!!! Its getting a little out of hand! Well, I should stop putting it off and finish! Time is running out!