I spent a chunk of today researching book trailers with Darcy Pattinson's The Book Trailer Manual. I own this on Kindle. I like to mark up my nonfiction books while reading them, so I learned how to highlight and make notes on Kindle. While I was at it, I learned how to make collections so I could organize some of the e-books I now own.
I feel as if I've accomplished something, but it was also quite painless. Those two experiences don't usually come together, I've found.