Xbox Live Marketplace discounts now until New Years!

Been holding off on buying that (or maybe those) DLC packs? Eyeing up a certain Arcade title? Well your procrastination is about to pay off because Xbox Live Marketplace is offering up 33-50% off deals on all sorts of games and DLC packs until New Years Eve.

The deals begin today with discounts on Red Dead Redemption DLC. The "Liars & Cheats" and the "Legends & Killers" packs are available for 400 MS points ($5) each while the "Undead Nightmare" DLC has been discounted to 600 points ($7.50) and the "Undead Nightmare Collection," which bundles all three aforementioned packs will be available for 1200 points ($15).

But wait - there's more! (Always wanted to say that) During the 11-day promotion if you watch Netflix, play Halo:Reach or Fable 3 multiplayer, you'll be automatically entered in a sweepstakes to win a prize package, featuring a 50-inch HDTV.

Microsoft has released a list of the daily deals with a clue as to what the deal will be. Here is a list of the deals, plus their best guesses, from Joystiq:

Daily Deals Clues (and Best Guesses):

• Thursday, Dec. 23: "Quiet Harmony - Get competetive or play co-op" (Castlevania: Harmony of Dissonance)
• Friday, Dec. 24: "Solve a Mystery - Your best weapon is the light" (Alan Wake DLC)
• Saturday, Dec. 25: "Gotta Feeling? - Can you master the moves?" (Dance Central - "I Gotta Feeling" DLC)
• Sunday, Dec. 26: "A Secret Agent - What is your code name?" (Perfect Dark)
• Monday, Dec. 27: "Extreme Waves - It's a race to the finish line" (Hydro Thunder Hurricane)
• Tuesday, Dec. 28: "Lazarus Project - Can you shepard the elite?" (Mass Effect 2 DLC)
• Wednesday, Dec. 29: "Moneyball - Play the future Monday night sport" (Monday Night Combat. Duh.)
• Thursday, Dec. 30: "One Foe - A world of good vs evil" (Fable 3 DLC)
• Friday, Dec. 31: "Find Her - Will you wake up on the edge?" (Limbo)