Snow has two positive uses: it can be used to build snow-jurors when neighbors don't show up to serve in a non-binding apartment court, and you can ski on it. Prep for the latter with today's Groupon: for $20, you get a ski or snowboard tune-up at Fatty's Snowboards ($40 value). Fatty's expert staff of board whisperers calm ornery snow gliders and whip them into shape. Tune-ups include a thorough cleaning, waxing, and scraping, making your ride gleam like the snow under a blacklight. Fatty's Snowbards has more than 43 years of experience in the industry, and hosts the well-known "Fatty's Parking Lot Jib Jam", where the Canton store's parking lot is turned into a snowboarding course, including tall ramps, grinding rails, and a live giraffe.