It's common practice to set out chairs or cones with a broom between them once you have shoveled your parking space out. Of course, your neighbors might not get it, so a sign might be in order, too.

Or just don't drive--that's the best policy. The busses will be running soon, and if you have studded tires (or can get them), then you can bike to work and get there alot faster than anyone else. I have studded tires if you want to come to Richmond to get them! But that, of course, would mean that you would have to dig out your car and drive, and your neighbors might take your space, defeating the whole purpose.