As your blog’s content increase, people in your niche will definitely mention you for intelligent or interesting discussions. This is, in a sense, an initiation of an interaction. When people speak of you, you should thank them for the mention and build up the interaction!
When you use a traffic tracking script such as the free http://www.statcounter.com, you can see where traffic comes from. If a large number of visitors come from a certain blog, you can be sure they have mentioned you in their latest post or linked to you from their sidebar or links page. What you should do is pay them a visit, leave constructive comments on their posts and build up a conversation!
As you continue doing this, you will start to gather a lot of friends in your niche. This is helpful later on when you decide to do collaborations such as interviews. In fact, when you’re out of ideas for writing on your blog, you can interview other blog owners in your niche! Human beings are curious creatures, so naturally they would like to know more about a person whose writings they read so often.
If you’re using WordPress, Textpattern, MovableType or any other advanced blog engines, you can also post trackback links on your posts. This means you can post an article about what other people have posted! Your particular post will then appear as a link on that post you have written about. This is definitely a great way to get traffic if you post brilliant insights about a post on a very famous blog. Since the famous blog already has a per-existing pool of readers, this is like a shortcut to hog their visitors! The only thing you would want to observe is to keep your posts sensible and insightful, or you’ll be viewed as a spammer.
On the other hand, if you’re using Blogger, you would not be able to use trackback links. However, you can post insightful comments on other people’s blogs and subtly include a link back to your blog. You can make it seem like you’re pointing to your blog as an extra reference to the subject of discussion. Of course, this technique is not only limited to Blogger users and users of other blog engines can employ this strategy as an additional traffic source.