Leveling through Northrend, you're probably coming across oodles of Chilled Meat. It drops off of just about every beast (and some other critters) in Northrend, so it piles up pretty quick. You get multiple stacks of it just questing normally. With it being so horirbly common, you might be inclined to just toss it. I mean, it can't be that useful, right? It's everywhere! No. Keep it. Trust me. Keep it.
Why should you keep Chilled Meat? Well, it's not only used in Cooking awesome things like Feasts (and everyone loves to feast), but it's also used in almost all of the new Cooking daily quests in Dalaran. If you're a Cook, you'll want a massive stockpile of the stuff. If you're not a Cook, your friends will really appreciate it, and if you don't like your friends that much, you can auction it for a lot. I've been watching the prices on them, and it varies wildly between being cheap and unreasonably expensive, depending on what the daily quest is and what day of the week it is. Weekends the price drops significantly since more people are leveling, but come the middle of the week, peoples' stores start slipping.