Usually this is only valid for hotel stays, but Travelocity is also including packages as part of the deal. It's pretty cool how you can shop - your departure city should already be included. Just use the drop-down menu to select which destination has offers and to see the final price for hotels and vacations.
I'll admit I had a heck of a time finding deals that were 50% OFF, but I did find them. Offers vary by destination and hotel/resort. I saw many with 25-40% off spring stays. I just want to warn you so you don't think I'm Mr. Bait-And-Switch.
Click here to have some fun finding deals on trips with Travelocity.