Or move the clock farther from your bed so you have to get up to turn it off.
That sounds like the easiest solution. 
'm still in the brainstorming stage...
While you're thinking about it... Several years ago I built two gizmos (before the Arduino with a different microcontroller). They could be built-into one project, but it was my 1st or 2nd microcontroller project and I built one thing at a time.
The first one is a "sunrise timer" that slowly fades-on the light over a 10 minute period. It's actually reading light over the head of the bed that's plugged-into the gizmo. The main light turns-on after the reading light is faded-up (X-10 controlled).
The 2nd gizmo is a beeper that's activated after 10 minutes, so the light is fully-on. It makes one short beep when it's first activated. After 30 seconds it beeps again. At 2-minutes (and again at 2.5 minutes) you get 2-beeps. This continues 'till at 15-minutes you get 15-beeps. It keeps me from falling back into deep-sleep, and I can count the beeps while I'm half-asleep.
I didn't build-in time-of-day clock (again keeping it simple) so it requires an external AC timer. Unfortunately, my X-10 system has been fouled-up for awhile so the AC timer isn't working.