-Read books
-Watch movies, videos, or TV shows
-Daydream
-Write
-Play games
-Exercise
-Hang out with someone
-Go out and do something
-Make projects or goals for yourself and work on them
-Study or do school work
-Listen to music or podcasts
-Go on the internet
-Practice a hobby
-Learn how to relax and stay in the present
You can attend any interesting games, reading books, online searching etc. Many online services are give good knowledge. Time is very important for all people. Some time it will go fast sometimes very slow.