lumieres The biggest piece of advice I can recommend is to make or go to a place that is only for work. For example, idk about your school but at my college they kept the library open 24/7 so I just went there to do all my work, there was no distractions and no temptation to play games or any of that. And if you just adapt it into your schedule it's not that big of an inconvenience, like if I had class from 8am-1pm I'd go to the library from 1-4 to do all my work, then go home and play games. If you school doesn't offer anything just go to a public library or at the very least set up a distinct spot in your house w/o a computer or TV or anything to do work.
Wow I can't believe I've never thought of that