I love a good booze rebate! In the last month or so, I've cashed in several, for bottles of wine and vodka. It does take a little extra effort and patience — you have to hang onto your receipt, fill out the tiny form properly, and wait 6-8 weeks for your rebate check — but you can save quite a bit that way. Remember to read the fine print, because often you're allowed to redeem multiple offers per household; at, say, $5 a bottle, that adds up.
This Smirnoff vodka rebate, unfortunately, only lets you do one per household (though you could always enlist a friend or relative in the cause). Still, $5 knocked off the price makes for a good deal... and an excuse to try out one of those crazy flavored vodkas they keep coming out with.