Many people don't like to study, so they put a low priority on doing their homework. They treat schoolwork as lightly as any sensible person would treat an unimportant activity.
When they get free time, they choose to do non-school activities that feel important. Suggestion: Decide that you feel it is very important to do your school work.
The steps are: read the assignment, take notes, think about it, write an outline, write a first draft, edit it, and write a final draft.
If your paper is due Monday, ask yourself when you need to start writing the final draft in order to have time. Work backwards from later steps until you schedule the first step of reading.
Some people will feel dissatisfied with you, and you will feel frustrated when you give up doing certain things you like. Frequently, they get their work all done early and they have free time for play that they can use without feeling guilty. Take part or all of their course, "Effective Learning," because it teaches good time-planning methods. They are: Alan Lakein, How to Get Control of Your Time and Your Life R.
Are you willing to pay that price in order to get your education? Do your most difficult school work during your best time of day. Some people say that the biggest benefit of using the "work first" rule is that you don't feel guilty when you do something else. Alec Mackenzie, The Time Trap: How to Get More Done in Less Time.
Most people's problems with "not enough time" are really decision problems.
Is your time problem really caused by your choices?
Then you will put it off, start it late, and have trouble.
You need three kinds of information to plan this way: Suppose you are writing a short paper.