Like everyone else, I'm waiting for the servers to go 'live' with the expansion. I use that phrase loosely, because I fully expect there to be crashes and issues. I really can't imagine running around Azeroth at 12:00, and having new quests and zones suddenly pop up at 12:01. At the very least I'm expecting some rolling restarts, though I'm truly anticipating some massive server failures and downtime.
I haven't really done much to prepare for Cata either. Since I plan on leveling my warlock first, I emptied out his bags, cleared the quest log, and logged out near the flight trainer in Org. I'm still not 100% sure on how to even get to the new starting areas. I expect I'll find some breadcrumb quests to point me on my way, and if not I'll just kind of follow the masses like I did in Wrath. Hopefully I don't spend 20 minutes standing at the wrong dock though.
My tailoring is at 436 or so, and I'm hoping that there will be some bootstrap patterns that won't require me to go back to Norhtrend to farm giant piles of Frostweave. My herbalism is maxed, my bandage skill is close enough, and my cooking finally hit 450 as well. I might spend an hour getting another few fishing points, but oh lawd is that boring.
My Paladin is also fairly set. She's in her tank gear and spec, ready to prot her way through the content if our second healer option falls through. I'll likely grind to 85 with a mix of Prot and Holy setups, but this is really my second option. I'm really looking forward to an expansion where the sum of my responsibility is "don't stand in the fire and don't let the DoTs fall off".
I've accepted that this means I'll have slower dungeon ques, and won't be able to just walk into any PUG run. I'm OK with that. I've healed PUG tanks, and tanked for PUG DPS. Here's a healthstone and a summoning portal - now leave me alone.
Here's hoping that Cataclsym lives up to at least some of the hype.