When i started writing i always wondered what other people had to say on that same or similar topic and so i surfed and googled other blogs from the same niche. Those don't have to be the very best of the best, but blogs and sites with interesting content and preferably with some readers and followers.
In one of those other blog i have read that the author was willing to share content in terms, you link to his articles he will link to yours. It sounded interesting so i googled that. A bunch of articles and advises came up and again it was reading time. There were a lot of similar authors who were willing to exchange links with content, and also there were others that suggested an alternative approach for guest writing and promotion.
The most often mentioned way of being mentioned on other sites was this: post a lot of good comments in other peoples blogs and paste your own link with it. Most good blogs and sites will have a place for pasting your own link predefined so try to find those. That way if you have something nice and smart to say the author will certainly read your pages and return the favor. Of course, he doesn't have to but i think that is a good thing because then you will have a genuine situation and know what people are really interested in.
Common Pitfalls
When i say write comments, i don't mean comments that contain just one line like "Great article", "Great advice", or something similar. I mean in depth comments that will make someone stop and pay attention to you.