I'd rather get 30 minutes more sleep than 30 minutes of being awake. So no snooze for me. I can't understand why people purposely want to wake up 10, 20, 30+ minutes before they need to and then they are that much more tired throughout the day.
My trick: pop out of bed with so much gusto that I'm jolted awake and never get lured back into the cozy bed's clutches.
All clocks in my house are exact time. I set them to within seconds of each other and to within seconds of the true time. In my experience, purposely having an incorrect clock has never helped anyone since they know it is incorrect and just adjust in their mind. I had one friend that every week or so, he'd set it back another 10 minutes. Then he'd adjust and be just as late as before. So next week it was another 10 minutes. He quickly got it off by ~7 hours and finally gave up since it never helps.