Homework perhaps? (Namely spelling) Reading? (if আপনি are one of the few who still practice that bizarre ritual) Watch tv অথবা ইউটিউব videos? Find a job??
Start drawing something যেভাবে খুশী and see what it turns into, অথবা do that one kind of art where আপনি draw the first thing that comes to your mind. Little drawings, like doodles, all over the place. Not too complicated, but tons of fun!