Probably get like, more than one hobby. You're not going to be able to stop gaming if you have legitimately nothing else to do all day.
"Homework" or other responsibilities don't cut it because nobody likes doing loving homework. If you only have 1 activity you become dependent/focus locked on it and it becomes impossible to break away from it. If you have several activities that you regularly bounce between, bouncing to school work or other responsibilities wont be as difficult.