lets you pay for coffee, get directions, hail a taxi, and more. Best practice: Use it to put boarding passes on your wrist via Passbook or as your room key at Starwood hotels.
These Bluetooth, noise-canceling
have built-in biometric capabilities. Best practice: Clock your steps while listening to a walking tour, thanks to sensors that track your calorie burn and heart rate.
continuously takes pictures everywhere you go. Best practice: Stop seeing the world through your phone or camera. You'll get plenty of cityscapes without pressing a button.
measures and analyzes UV rays. Best practice: Never get sunburned again. June's companion app notifies you when it's time to reapply your SPF 50 or head into the shade.
--By Tom Samiljan