How to stop procrastination?

I realized that I have a fear of not understanding my hw and so I avoid. I also want it to be perfect instead of slow absorbing. I hate this habit and I want to change it. I want to be a go getter and result oriented. I tried setting goals. I try calendar and not thing is working. Can someone give me advice? I am at a university and I study mostly all the time but I am not absorbing as my classmates are. I am even considering going to Kumon (tutor for little kids) to get help. How was your thinking process when you are result oriented? How did you stop procrastination or what is the secret to stopping it? It is ruining my goals and life.