One: You can travel on weekends, see the mountains, see the water and see different places. Maybe you will find something new.
Two: you can learn something. For example, if you are interested in computers recently, but you are not good at them, you can apply for courses in this field and take a certificate or something.
Three: You can also watch TV, surf the Internet and watch comedies at home. You will feel happy and people will be much more relaxed.
Four: You can keep small animals at home and take care of them in Doby when you have time. You will find that there is not enough time.
Five: Being a volunteer is meaningful and can kill time. Why not?