-Best thing to do obviously is play games, watch anime or youtube.
-If you dont wan to do that read a boring book from school or do homework.
-Think about what you want to know or what you could do in future.
-Run out of ideas what to do and think of new ones.
Edit: Dream about you being a cute anime girl wich is the best idea ever to do.
Thx for Meth bringing me to that idea.