I'm going to write up a separate post on EntreCard this morning, since I've been planning on doing that for some time now anyway for my own blog, and it would fit better here, but anyway in the meantime, some things that have worked for me.
I don't advertise my blog anywhere, except for on EntreCard at the moment, but have experienced pretty steady visitor growth since I started with this blog. I also had a previous blog that I ran the same way, and the traffic to that one was 3 or 4 or 5 or I don't even remember how many times more than the one I have now - I'm happier where I'm at now, but for those of you looking for more traffic, here's some stuff I picked up blogging since the dawn of time. I'm not necessarily into advertising, and tend to prefer more organic traffic growth. There's tons of ways to drive droves of people to your site - tricks, gimmicks, contests, tons of stuff - but long term sustainable growth of traffic comes from building a loyal community and letting them go out and talk about you.
1. People stopping by in great numbers boosts your traffic, to be sure, but the way to get consistent growth is through regular, consistent readers who are going to go out and do your advertising work for you, by promotiing one of your posts or linking from their own blog. In order to get those readers, consistency and frequency are key. Someone said in another post, there's always someone out there who wants to read what you write, so developing a good, solid blogging habit, writing every day or on whatever schedule you've set for yourself, as long as it is frequent and consistent, will get you plenty of loyal readers who will bring friends. Even if you think you're writing crap, write it anyway. Write everything, always, no matter what. Soon it's an ingrained habit and way easier, and even the posts you think are absolute crap are sometimes the ones to absolutely take off in terms of visits, comments, discussion, etc - which only leads to more posts.
2. Make sure you're as interactive with your readers as you can be. Eventually, this gets out of hand and is harder and harder to do, but do the absolute best you can. Especially for a new blog just starting out, respond to comments through email and on your site, if you notice someone commenting for the first time, drop them an email thanking them for stopping by, etc. The more involved you are with your readers, the more likely they are to stay around and build a community for you, which is going to draw more people over time, slow and steady, but more nonetheless, and it will draw the kind of traffic you want - a link from BRK, one of your posts getting on digg, etc - that's going to bring a big spike, but you need to count on the small community of loyal readers to build you long lasting consistent traffic.
3. Make connections to other bloggers you admire. For example, ask if you can interview them, mail them some questions and post it on your site, and let them know you're doing it so that they can link from their site if they choose to. Take advantage of the trackback feature whenever you can - the readers of other sites interested in the post their reading will follow the trackback to your site to continue/add to the discussion.
4. Write a guest post for another site. Even bloggers without billions upon billions of hits every day appreciate a break every now and then, and that's free advertising for you, whether that blog gets 10 visitors a day or 10,000. Find a blog you like/admire/participate in, comments-wise, and write a post that suits the tone and topic of that site. If you're a lock and you really like a priest blog, write something about lock/priest interaction in raids from your point of view. (You can't have that idea, though, because look right here, I just wrote it: Stop fscking healing meh!!!. Sorry.) Anyway, write the post, drop the blogger an email, and ask them if they'd like to use it for their site. Ask them if they'd write something for you site, ask them if they'd do a joint post with you for one of your sites, ask them if they'll write a counterpoint post to one of your posts, or if you can write one for one of theirs. Again, doesn't matter how big or small the blog you're targeting is.
ANYway. Like I said, I don't know so much about advertising, exactly, as far as actual ads go, but those are some pretty decent ways to work on growing your own community. Getting your link out there is all well and good, the more sites you're link from, the more traffic you're going to get, but consistent visitors who participate regularly in your site are the ones you want to target, and they're less likely to be swayed by the random link here and there.
Um... the end.
I'm Mr. TJ, and this is my demonic ponytail.