What hobbies can your do solely on your computer?

Question

I only need to sleep three hours a day and am often on the computer at night. Are there any hobbies that I could do that involves me making good use of this extra time?

Answer 1

There are scrapbooking kits where you can design the pages on your laptop, find a brain computer game so that you are learning - many are fun. Learn Adobe Photoshop.

Answer 2

Genealogy. Track your family tree.