I did a quick search and couldn't find this trick listed, so I just wanted to post it up and make it blatantly obvious for everyone.
Hardened Shell:
Hardened Shell - Item - World of Warcraft
This might seem obvious for all, but if you queue for arenas -- your Hardened Shell (used for dismounting other players) is immediately taken off of CD and can be used immediately after entering the arena. Cause havoc in the world by using that shell, queuing for arena, /afking out, and dismounting someone right away.
Most people are using this same cooldown trick for other CD refreshes, like Challenge Modes -- just wanted to make this amusing trick obvious.
Helpful Wikky's Whistle:
Helpful Wikky's Whistle - Item - World of Warcraft
Although Wikky's bags are usually full of mediocre stuff -- they sometimes hold a potion or two, and a handful of motes and ore. It turns out that multiple people can accept Wikky's help at the same time, essentially getting the buff to cause Wikky to return with a bag of goodies -- but on top of that, when he returns for any player, every nearby player can accept his goody bag. This way, you're getting one buff for everyone in your group, and one bag for every buff.
Basically, in a group:
- Call for Wikky
- Everyone open his dialogue
- Use a dbm pull countdown, everyone has to accept the window at the same time (he will run away and people will miss the buff otherwise).
- Kill 50 mobs, for each player with buff.
- When Wikky arrives with the goody bag, everyone opens the dialogue
- dbm pull to accept his bag of goodies. Everyone will get one.
Enjoy!