part-time jobs/work
College students can improve their lives by getting paid for part-time jobs. You can also exercise yourself.
Read in the library
Books are the ladder of human progress. There are professional books and various classic novels and masterpieces in the library. An interesting book can immerse people in it.
Do volunteer work
As volunteers, college students can also get volunteer time while improving themselves. After a long time, they can enjoy some discounts or write them in their resumes. If you want to take the exam, this is a plus item.
Obtain a certificate
You can take a driver's license, teacher's license and so on. During your college years. Actively preparing for the exam during the summer vacation can get the certificate and gain an advantage in future applications.