Everything that I memorize I put in there. Makes it way easier. When I go to a conference or something and take notes, I put the key points into Anki so i won't forget.

If you do it every day you'll get amazing results, however I'm not that dedicated, but do it multiple times per week anyway.

Basically it makes my life a lot easier to have certain things memorized, and Anki makes memorizing stuff easier.

A lot of people (esp nerds) believe it is a sign of weakness to use flash cards. It's their loss.