Self Improvement Made Easy

I wound up with a schedule for the semester that always ends up having large assignments and reports due on both Thursday and Friday. When Wednesday night comes around, I am swamped, and sometimes I don't finish everything. Obviously I wouldn't go for this schedule again, but I'm stuck with it, and I need to find a way through the semester. I have never been one for getting stuff done way in advance, and it's really hard to change. Any tips or anything you can share from experience would be great.