I started doing Pomodoros [1] recently and I noticed a leap in my productivity. It also helps me to refresh my mind regularly and to stay focused on my tasks more easily. [1] http://en.wikipedia.org/wiki/Pomodoro_Technique
Seconded on pomodoros. I can credit it with getting me through seven novel drafts, through a successful Kickstarter campaign, and even with helping me find this new, much better-paying job.
Best part about pomodoro? How easy it is to begin using it!! You don't need a lengthy book or a long lesson. It is just as simple as using the damn timer.
I don't know why I became lazy and stopped using it. When I tried it for a week I was definitely at a higher bound of productivity for my school work. Totally helped me to gain more time to focus on my own projects. Time to start up again.