Thing 18. Education

TED is an app that works two ways for me: it's educational AND entertaining. I really enjoy hearing interesting people talk about subjects they enjoy or know a lot about. TED's "surprise me" feature is way cool: you choose a topic (jaw-dropping is the best), then select the amount of time you want to spend, and the app presents you with one or a series of talks to watch. Of course, there are also topics to browse and a search engine.