If co-workers (or friends) have come to expect an instant response when they send you a text, it can be useful to let them know when you're in a meeting and unavailable for a while.

With just little bit of setup, you can create the SMS-equivalent of an email "out of office" message. Even better -- you can build a text autorespond that automatically turns itself on whenever you've got a meeting on your calendar and switches off again when the event is done.

Bonus: You can also have it mute and unmute your phone, which is easy enough to do manually with a single tap when you walk into a meeting but also rather easy to forget.