At the end of this semester, you can make a summary of the semester. In the process of summing up, I found out what I did well and what I didn't do well during this period. It's not done well. Can it be remedied? If it is because of your poor knowledge or ability, then you can make a plan to supplement your knowledge and exercise your ability this winter vacation. But after the plan is made, you must carry it out, if your self-control is not very strong. Just find someone to supervise you, preferably someone who is intimidating to you. This will ensure the smooth implementation of your plan.