Winter bike commuting - finding the motivation

We've had everything ready all week to ride to work, and the weather cooperated too. Except each morning we succombed to the appeal of the car.

So how do we plan to motivate ourself to ride tomorrow morning?

We use our traditional motivation plan.

This means we give our coworker $20.

They give it back if we ride to work.

This has always worked for us. Greed is a powerful incentive.

Update: The motivation plan worked perfectly!