If you're planning to ski Tahoe this season, you'll want to check out Bay Area on the Cheap's post. Buy some gas at participating Shell gas stations, and get a voucher good for one ski ticket when buying an adult one, at Mt. Shasta, Northstar and Sierra-at-Tahoe. Tickets are good through April 16th. Bay Area on the Cheap has all the links and details.
The post also shares a bunch of other Tahoe ticket deals. Check it out!