As good as it might feel to not wake up when the alarm clock goes off, the snooze button is not your friend. It's like the drug dealer in a PSA from the 70s. The first hit is free, but you'll be paying for it later.
That was the message relayed by behavioral scientist Dan Ariely in his recent Wall Street Journal column. "Set your alarm for exactly the time you need to get up," he writes. "Since you want to start your day at 7am, you may be tempted to set the alarm a bit early — let's say 6:40am — and hit snooze a few times until it is 7am or maybe even 7:15am. But if you pick this snooze strategy, your body can't learn the conditioned response between hearing the alarm and getting up."
Studies have corroborated that conclusion. You're better off sleeping in a continuous stream as long as possible, instead of breaking it up at the end with the snooze button. That fragmented sleep can do more damage than good, as ASAP Science demonstrates in the below video.