Entertain yourself inexpensively!
Expand your vocabulary.
Improve your ACT and other test scores.
Visit places you might never get to actually go.
Improve your thinking skills.
Improve your writing skills.
Learn about places, things, people, etc. that interest you.
Be knowledgeable about more things.
Reduce your stress level.
Gain a new life-long hobby.
READ! READ! READ! READ! READ!