I recently had the problem of being too ambitious in setting an alarm and snoozing and sleeping in. My solution has been to be less ambitious and set it at a reasonable time (7am instead of 6:20) and move the alarm a minute earlier each day. A month will give me 30 minutes, which is great.

This is all a slow return to normalcy after a new kid.

Another trick I use it to put my alarm (my iphone) across the room. If you have to get up to turn it off, then you're more likely to stay awake.