3. Have a plan and follow it step by step.
Stick to the plan that you have made. Follow it and try to be punctual and disciplined. Create a sample first and then copy it. Every week fill it out with the things you have to do. There you should include your classes, part-time job, personal life, time that you wish to spend with your family and friends. Have enough time for rest and your hobbies. See how reasonable it looks and whether you will be able to accomplish your own plan. Do not throw away the old samples. You need them to see the progress and compare what weeks are the most difficult and busy.