Breakfast Topic: WoW Essentials

As gamers, we all have strange rituals and equipment setups--in real life. I always have paper and pen next to me when playing, and I often have a laptop open too for email, IM and Thottbot. Add to that the usual gamer staples of soda and snacks, and I'm all set; headset and Zboard at the ready, I can plunge into WoW feeling well-equipped.

When I end up playing elsewhere, I always feel there's something out of kilter -- from the lack of Teamspeak to the missing addons. What's your essential WoW kit? Any item or addon you simply couldn't play without?