I decided that I would benefit in many ways by getting more on top of things. So first got rid of things that were distracting. I unplugged my internet cord when I was doing homework, and kept books that weren't pertaining to the topic at hand in my desk. I designated a specific time each day in which I had to get so much of something done in a certain amount of time. For example, if I needed to go to the bank and study for an exam one day, I'd set aside a few hours to get those things done. I didn't allow myself to do anything else until I had completed those tasks. Don't try to keep the same hours every day though. I know that personally, my schedrule is so busy and varied that I can't designate the same hours every day. So if I need to get something done I tailor my hours to fit the day. 

Eat well. It's hard to concentrate if you're hungry or thirsty. 

Even if it sounds like a pain, write down your goals for the day/week/month. Even if its just a little to-do-list on a sticky note. Just keep it where you can see it. 

Reward yourself. After you're done of course. Get a movie or go out for coffee or something.