When I was having a lot of trouble getting out of bed reasonably promptly in the mornings: practice getting out of bed - but not after just having woken up, that's what I was having trouble with in the first place. No, during the day, having been up for a while, go lie in bed for a couple of minutes with the alarm set, then get up when it goes off. Also, make this a pleasant routine with stretching, smiling and deep breathing.
I found this idea on the net here, which may have more details: http://www.stevepavlina.com/blog/2006/04/how-to-get-up-right-away-when-your-alarm-goes-off/
I tried it and it seemed to help a lot for a while, and I feel more in control of my weekend mornings.
I have found that I wake much more effectively when the alarm is very quiet; rather than waking suddenly and having my brain rebel, I wake over the course of 30 second to 2 minutes. This works much better than it has any reason to.
The downside is that a very quiet alarm is easy to miss, and if there is environmental noise at the same time as the alarm goes off (from the air coming on to trash pickup), it's much too easy to sleep through. The solution that worked best for me was to run a white noise generator (actually an air filter) all night; this raised...
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.