Watch your favorite movies offline
The apps: Amazon Instant Video
If you pay for Amazon Prime, you might not know that your subscription gives you free access to Amazon Instant Video's lineup of TV and movies, which you can cache to play offline as long as you have enough storage on your device. Pro tip: double-check before you go that everything's fully downloaded and playable in Airplane mode. It blows to find only 20 minutes of Tootsie loaded when you’re six miles in the sky.
Similarly, if you've got a premium subscription to Apple Music, Rdio, or Spotify, make sure you’ve selected your favorite playlists and albums to be available offline so you can rock out at 30,000ft.