Ask HN: I want to get through university, help?

I'm 25 studying math in university, I have 4 years left, I took the semester off because I lost motivation, I have really bad study habits, if you go through my post history I ask for similar advice.

I want to get through this math degree, not to become a mathematician but to learn to think like one. I then want to combine it with programming and go the startup route.

How can I build the necessary habits, skills, etc, to get through university? School just always felt like a slog, I never did well, and I don't attribute it to my intelligence but just really bad habits.

What got you through school? How did you do it?