When I wake up at 5am (Mon-Fri) so I can be to work no later than 6am (10-15 minute time cushion), I have come up with some techniques to get me going.
To begin with I know what it's like to not want to get out of bed at that hour. With the furnace programmed to warm the house from 60-degrees fahrenheit to 70 by the time I hit snooze once, the micro-fleece sheets covered with a heavy quilted blanket keeping me cozy warm in the bed, and the electric blanket on low on top of it all! Getting out of my warm caccoon is the last think I want to do when it's zero to 25-degrees outside.
I just hit the hardwood floor "running," slam a glass of warm tap water, brush my teeth and shave, and suit up for my 45-minute ride.
The greatest motivator for me, that will never go away, is that I see the morning traffic jams. I'm in the military, so there are around 100-people trying to get on base during the exact same time I am trying to, which is a 15-20 minute wait in line for a security guard to scan my ID card. Talk about a waste of time. Then I get to work and I have to find a place to park my F250. All the while I'm not really awake yet, just going through the motions.
I have determined that I could probably be "diagnosed" with road-rage. When I drive, my "fight or flight" mechanisms are flowing when someone's too close, or if someone isn't going fast enough. I get pissed! I don't punch my steering wheel or anything physical, but my internal chemistry is flowing with adrenaline and hatred for the other driver.....When I ride my bike I'm as cool as a cucumber the entire trek to work. I show up happier, awake, and ready to start my morning workout with the guys in my platoon; having already bike 10-miles, I'm already warmed up for the runs/pushups/situps we attempt to accomplish every morning.
All in all. What gets my ass out of bed is that I know that when I get to work I can say that I've already accomplished more than the next guy, part personal satisfaction and part ego I suppose. A lot of my co-workers think I'm crazy for riding in the dark and cold when I could drive, but for me it's not the same. Secondly, I reward myself once I get to work with a warm cup of coffee while I hang out with my co-workers. Lastly, I'm 30-years old now, and after I ride 10-miles to work I can take my (18-28 year old) guys out for a 4-mile run (in 32-minutes or faster) and do it faster than them without feeling as tired as they look, then I know I'm doing something good for myself.