More of the same
Write good stuff. Get people to read it.
If you can stomach it, go to the official Wow Forums and watch the threads in your favorite class forum. I did this for a while on the Paladin forums and then realized that "What gear do I need to start healing in Kara" was a question that came up about every other day. It helped that I was just about to 70 and was interested in getting that gear list for myself.. so I compiled the list and it's now my #2 most popular link on the blog. I get about 8-10 visits to that post every day. (http://chicanery.fibergeek.com/2007/08/ ... ling-gear/
I made the list of gear and then the next time "what gear do I need..." came up I posted the link. I did that a couple of times.. and eventually it got to the point that others posted the link when the question comes up.
The forums are a great source for blogging ideas.
Every post I put on the forum is one less troll post on the forum. Every post I put up has my name and blog URL in the signature. I get quite a few links from the forums to my blog.
If you, in your comments on another blog or forum, seems like a good source to read, chances are you'll get 1-2 more people to look at your blog.
Search traffic is nice.. but really search traffic doesn't stay around. You want to appeal to people who will put you in their bookmarks, add you to their blogroll, and add you to their RSS reader. To do that you have to be worth listening to, have something to say.. and be at least vaguely entertaining.