Quest preparation

There is not much to do till WotLK comes, except for preparation for it. The lvl 70 items don't worth much, so unless you have lvl 65 greens, you should not bother upgrading them. However there is much to do to be prepared.

I've already written about tradeskills, money and a bit of honor. Warcraft econ wrote about preparation with honor, bankcleaning and tradeskills. WoW economist wrote also about bankcleaning. However I found an area not covered yet: quests.

You can perform quests in Outland and not return them. When the expansion comes out and we have XP bars again, you just fly a round in the deserted Outland returning quests and picking up XP. One quest provides around 13K XP, so 25 quests can give 325K XP.

I don't know if daily quests count, but it's probable since the Headless Horseman's firefighter daily quest provided XP for alts. However I don't take risks here, try to complete as many normal quests as possible.

However if daily quests give XP I will be a resident in the Isle of Dailies. While the new areas will be overcrowded, the Isle will be deserted, providing 12 lvl 70 quests in an hour. So if dailies give XP, Isle here I come!

Warning: there are speculations that these quests may not give XP just money. I cannot disprove this idea (though find it unlikely) so use the tip on your own risk!

Another preparation topic:
there is a large debate about the prices in WotLK. Some hints to help you:

• lvl 70 armor and weapons will be no longer special. As there is not a huge market for lvl 68 armor (mostly driven by enchanters), there will be no huge market for lvl 70. So sell, sell, sell!
• Tradeskill leveling materials will be needed, so from Copper Ore to Arcane Dust there will be market. However you can expect a drop, since most people won't level tradeskills in the first 1-2 month of WotLK. Tradeskill-leveling will be back to business when people find out at lvl 80 that their current tradeskills are not good for them, or when they start a new alt, or new players reach lvl 80 and will level their tradeskills. So the tip: hold now, sell later. If you have lot of money, you can even buy now, sell later.
• people are having lot of money now, since raiding mostly stopped and people are farming money. It means they can buy anything and everything, prices will skyrocket for the new world items, mostly for new world tradeskill materials that they will use to level tradeskills and craft BOP items. I'd suggest to wait with buying these until they run out of money (2-3 weeks at best, considering their economic skills). I will level my tradeskills only after reached lvl 80 and need them for raiding and not before. Every day the prices will drop.