The best way to get out of bed is desire to get out of bed. Concentrate on the coffee (if you like coffee) and make it interesting/a ritual and when you wake think on that and let your imagination pull you toward that and how good it will taste, and how good it will feel to be more awake instead of so lethargic, etc. Moving to a hot shower can work that way too.

I use my projects on my computer, my hobbies, and conversations on Facebook and here and other places to help me get up. I wear a pedometer every day and post my steps on a site so want to do that in the morning (record the number on a slip of paper the night before as I take the pedometer out of my pocket before bed) and want to work in my journal and just see what's happening everywhere. Don't think of it as having trouble getting out of bed, use your curiosity and imagination to pull you forward to what's happening outside bed instead of concentrating on the bed sucking you back to sleep