FORCE YOURSELF INTO A GOAL ORIENTED WORK PATTERN FOR AT LEAST THREE WEEKS.
If you really commit and force it for the first 3-4 weeks it gets MUCH easier to remain motivated and on track. You just need to get in the habit of being productive in ALL areas of your life by working towards goals. You're not going to be able to just focus on academics or magick and slack off in the rest of your life. It does require a little planning but nothing you can't get done in one spurt of motivation.
First, make a list of five areas of general focus that you want to achieve goals in the short term (magick, academics, personal health, TIME MANAGEMENT). Then list the specific goals you want to achieve and work your way back from there to a work/study/diet plan.
Second, and this is important, set your watch or phone to chime/beep every hour on the hour to remind you to STOP EVERY HOUR and ask yourself whether what you're doing is productive or working towards those goals. This might sound weak, but the constant reminder to evaluate your activities helps (at least for me) you stay on task and not get distracted by things like the dicking around on the internet. It's important to be constantly checking yourself and remembering that your working towards something.