On top of reading, I've been recycling out-of-date Kindles.

Here's a link to Kindle Modding

You can get a nigh-indestructable e-reader for very cheap, recycle something in the process, and it holds over a thousand books.

Hell, it's so satisfying I've been handing them out to friends and family.

Also you get to rip intellectual property right out of Jeff Bezos hands! What's not to like?