Thirded. I've bought a few books and tried audio, youtube videos... Headspace is the only thing that's helped me keep a meditation schedule for more than a few months.

I know some people don't like how much Andy speaks during the sessions, but I liked it a lot. It also helps with that "am I doing this right? Should I scratch that itch? What should I think about? Or not think about?" feeling that comes up, because he addresses those feelings a lot.