The Bicycle Commute Challenge is a nice system to give people reminders about the bicycle commuting and I really like the personal competitive spirit it brings out in people. Reminders to keep biking are key to changing behavior long term. I have found that stickers placed at key locations are helpful reminders as my family makes transportation decisions. The kids love stickers and they are like subliminal messages that make you think twice about how you get to the store to pick up milk or even getting to school or to the soccer games on the weekends (see the old post about our use of bakfiets as the new SUV).
Bicycling will never have the marketing resources that the automobile companies have, so it is the little things that make a difference in our household that are key.