Good luck. I can't really help you, because I live in the UK, which is considerably more civilised, but I started three years ago (having never taken a driving test let alone held a license) by saying to myself that I'd never travel by car under any circumstances. I think that's key; otherwise it's like being a little bit pregnant. It's always going to be hard to refrain from doing something that externalises costs on others unless you have an iron rule never to do it at all.