Ride a bike...

[PowerPenguin]

...Instead of driving your car when you can. You will get free excersize, meet new people, save money on gas, and do your small almost insignificant part to save the atmosphere (like 80% of air pollution is from coal/oil burning power plants). When you are driving, be sure to consolidate your errands as much as possible. I, for example, only drive my car once every 2-3 days on average, and I try to do as many tasks in one trip as possible.

[Puke]

Bicycles don't have heaters. 

[PowerPenguin]

Pansy! 8-) Only do it during the summer then.

[GCG199]

You only will be cold for the first minute or so when riding a bike in winter conditions. At least this has been my experience.

It is actually too easy to sweat real bad even on a very short bike commute, especially when carrying a backpack.

I am more concerned about slipping on ice and having a bad fall then being cold.

If you want more info about bike riding in cold weather conditions, check out:

The winter cycling section of www.bikeforums.net/  There are also sections on commuting and living carfree.

www.icebike.com/

[PowerPenguin]

mountain bikes rock.

[Jim Johnson]

An entire army that rides bicycles was another reason Hitler didn't invade Switzerland.   

[TackleTheWorld]

Critical Mass, a spontaneous, unsponsored, disobedient bicycle event has befuddled the authorities in San Francisco for years.

[PowerPenguin]

I was wondering if someone would bring that up. They are in portland and seattle as well. Essentially they are mostly assholes, and most of the assholes are socialist (coincidence?). 

[Recumbent ReCycler]

I rode my trike yesterday and today so that I wouldn't have to drive.  I need to get fender brackets so that I can mount the fenders over the front wheels.  I got a lot of road spray on my jacket today.