I used Anki a lot during school, especially to study physics, chemistry, physiology, and other science classes. I had thousands of cards by the end, and flew through university courses that others really struggled with.

I've kicked around the idea of using it now, but I can't convince myself that the benefit of memorizing outweighs the cost of all the time I would need to dedicate to this.

What kind of content do you use for Anki?