1. Do public welfare
You can devote yourself to some public welfare undertakings, such as pet rescue. There are pet rescue stations near some university towns. You can go and see those homeless animals. You can also go to a nursing home to see the elderly. Their children and grandchildren are usually busy before being sent to nursing homes. They need company and can talk to the elderly.
study
If some students are not sure whether they want to take the postgraduate entrance examination, they can spend more time in the library and prepare for the postgraduate entrance examination in advance. If they don't take the postgraduate entrance examination, it will do no harm to improve their professional ability.