Play pretty much any song just by asking
If you've made the decision to sign up for Amazon Prime, Alexa will play you anything from Amazon Music's entire library. Ask her for something specific ("Alexa, play Adele's album 25"), or less so ("Alexa, play some smooth jazz" or "Alexa, play something calming"), and she'll abide.
When you link her to your other media accounts via the app, the breadth of available content expands tremendously -- all you need to do is ask for what you want along with with the service's name, for instance, "Play my after-work playlist on Spotify" or "Play the Radiolab podcast on TuneIn."
Get the lowdown on your schedule for the day
Like a living, breathing personal assistant, Alexa is trained to keep you up to speed on your schedule. As long as you've synced your Google Calendar, you can ask her what your day looks like, when your next meeting is, and what time you should leave for it.
Find out how your commute's looking
Once you've set where you live and work (via the Traffic tab in the app's settings), you can ask her what your commute's looking like at any time, and she'll let you know what the current traffic conditions are for your route.
Let her order an Uber for you
Alexa plays nice with a bunch of third-party apps, including Uber. Any time you need a ride, just ask her to request one ("Alexa, ask Uber to request a ride" or "Alexa, ask Uber to request an UberX"), and she'll dispatch a set of wheels to come pick you up.