WoW holidays are special times. There are gifts and games, costumes and cavorting, and copious amounts of food and booze. However, once I mine the holiday's quests and achievements, I like to find things to do during the remaining time that don't have anything to do with the intended purpose of the festival. Whether it be using the holiday items in ways they weren't meant to be like storing "Bravado" Cologne from Love Is In The Air in my guild's bank so my rogue is the nicest-smelling ruffian you'll ever smell as he sneaks up behind you, or taking advantage of the terrible, terrible travesty that is PvP battlegrounds during Children's Week to rack up some easy honorable kills while everyone's focused on getting the achievements and people who never touch battlegrounds with a 10-foot-polearm jump in with both feet, sometimes holidays have little extra bonuses that just take a little thinking outside the box to enjoy.
My most recent holiday adventure was during Brewfest. As I'm sure many people realized, the rams you get to race around outside Ironforge make excellent temporary mounts for low-level toons looking for a quick ride. I took the opportunity to roll a dwarven paladin because it had been a while since I laid some holy smack down, and by simply accepting the There and Back Again quest, riding the ram around Dun Morogh to my next destination and then abandoning the quest, I effectively had a mount throughout my first 10 levels (or at least half the time, since each ride was a one-way trip).
It's obvious Blizzard encourages this playful attitude; see Dartol's Rod of Transformation, for example. What other workarounds have you discovered while playing, whether from other temporary events like the holidays or more regular things like quests?