Originally Posted by squegeeboo
Slash your tires on the car, that way you'll have to bike it, regardless of how much you want to or not

My, more gentle approach, works well. Carry your bike to work in your car. Leave the car at work and ride in. The next morning you don't have much choice but to complete the trip. I don't like the short days either but I found time on the bike (even in the dark) is a remedy.