I just got the iPhone 5s. Now what?

What are the best features? Hidden features? Useful tweaks?

Fingerprint Scanner; Dual-LED Flash; M6 Processor for motion data (for fitness apps); Improved Rear Camera… That's the main things I can think of. Tweaks? Turn off Bluetooth if you don't need it… Set up Do Not Disturb for when you don't want your Phone to go off. Get the Free iLife/iWork suite if you want any apps from it…