This past weekend, I got my alt druid to level 60. For some strange reason, I decided to level all the way to 60 in the Azeroth before heading to Outlands. I think part of me wanted to make the quests/mobs just a little bit easier, even though the xp bonus would out weigh the risk. Furthermore, since you pretty much have to have 300 mining before heading to Outlands, I needed to finish up some mining rounds as well.
So, here in a couple of short weeks, we'll have 2 expansions out. People may be eventually be telling the same levling stories of, "Yeah, I hit Northrend at 68 for the incresaed xp and gold," and skipping Shadowmoon Valley and the like.
But here's the curiosity: What do you do before you head to Outlands on an alt? And what will you do if you're leveling another toon to 80 that isn't 70 when Wrath hits? (DK maybe?)
I think the void from 58-60 is actually much better spend going to Outlands. Blizzard finally started "getting it" with quests in the first expansion. We don't want to have to run for 15 minutes to complete this quest. We don't want to have to kill 2000 gophers. We want a sense of accomplishment much sooner than that. Oh, and some of us would like a good story to go along with it as well.
From 68-70, it's not quite as bad, but some of the quests in Northrend are a lot of fun. (It could be partly because they're new.) And it's not quite the jump in rewards that Outlands was from Azeroth. So, I'm guessing that I'll probably stay in Outlands until 70, and then move along to the frozen North.
As for other things I do. In the case of my toons that have gathering professions, I make sure they have those to at least 300 (in the case of skinning, I probably could have been to about 375 before I even left Azeroth). And I empty my quest log of the unwanted/old/not completed quests. Other than that, I don't look back.