Gear4 Renew SleepClock, $200, gear4.com
Perfect For: The Super Stressed
Not clocking quality shut-eye seriously ups your risk of a heart attack—and not the forlorn feelings Trey Songz claims. Start keeping tabs on your Z’s with the Gear4, which measures snooze patterns by tracking breathing and length of rest. Download the app to your iPhone, dock it, and when you wake, you’ll have data on your nocturnal habits.