Now HAS to be the time to get a set of these, so you can get home, and safely too:

Snow Tyre Socks, only 30 a pair - which is all you need for a 2 wheel drive car. We'll ship them 'Next Day' too, even on our Standard Shipping rate of 3.95 per order.

http://www.morethanpolish.com/tyre-socks.asp

These European-made all fabric snow tyre socks will give you instant grip on fresh and compacted snow, enabling 2 wheel drive cars to drive off effortlessly and travel at up to 50km/h (30mph) safely on snow.
They work as well on a sports car as a family motor.
Fitting is so easy -just fit the elasticated cover round most of your tyre, drive forward or backwards a few inches and complete the job. It only takes a minute or two.
Remove when on a clear road for multiple event re-use.