When faced with warnings of imminent change, what do you do? Do you stockpile and organize, or do you let it just happen? Cataclysm is fast approaching and preparing for it in-game can be as much a part of the process as pre-ordering a copy of the game in real life. There's several new things coming in the expansion that certainly may go smoothly if you take the time to plan for it -- two new races (worgen and goblin), new level cap, and a lot more classes opening up for the existing races. In the past, people also stockpiled things like cloth for bandages or mats for new tradeskills that were being introduced. Some players have given up doing anything in general and stopped playing WoW until Cataclysm hits.
I myself tend to be more of the planning type, especially now on the horizon of my third expansion -- I am stockpiling a lot of gold in the event of some ridiculous new transportation cost. I also recently completed Loremaster on my main character as many of my favorite quests or zones in the old world might be changed or gone entirely by the time the expansion rolls around. I also might sink a little bit of money into buying a Traveler's Tundra Mammoth. Having a portable repair-bot and vendor will ease the burdens of leveling considerably. Some new character names might have also been reserved on my server in preparation for a cute little gnome priest or worgen rogue in the future.
So what have you been doing to brace yourself for another (possibly your first) expansion? Is it grinding out badges for BOA gear for a new toon? Perhaps you are sitting around Dalaran doing nothing!