If you have a blog related to a specific field of knowledge, chances are that someone on the internet has a question for you.
By establishing yourself as a helpful member of a message board or forum, you can attract a community of regular readers to your blog. Not only will your knowledge benefit the person who posted the question, you’ll also help others searching for information on the same topic. And every viewer is a potential blog reader, since they already have an interest in the subject that you are writing about.
To find a forum, search the internet for your subject area + forum. For instance, if your blog is dedicated to the art of bonsai, you could search for bonsai forum. There are about 10 forums listed in the first two pages of the search results for that search query.
Review the forums you find based on the following criteria:
How long ago was the last post made? How many posts are made in a day? More active forums generally have a larger user base, so more people will see your posts. (There will also be more people answering questions.)
If you find a less active forum where questions are being posted every couple of days (but aren’t being answered), you could answer questions there and help to breathe some life into the forum.
Many forums don’t allow advertising, but do allow users to add a website link to their signature. (A forum signature is similar to an email signature—it’s a place at the bottom of posts to add your name and/or a hyperlink.) Read the forum guidelines for each site to determine if signatures are allowed.
Some forums require you to post a certain number of times before you can add a signature to posts. If so, great—they care about keeping the forums free of spam. Just be sure to choose a forum that will eventually allow you to market your blog.
If posts appear in search results, then people will be able to see your answer (and blog link) when searching for keywords/phrases contained in the post, thus increasing your potential exposure.
To determine if forum posts are indexed by Google:
When a website nofollows a link, it instructs search engine robots not to access the link. If you find a forum that doesn’t nofollow links, the signature link will provide your blog with a backlink for each post.
There are two ways to find out if a forum nofollows links:

Choose a couple of forums to participate in based on your evaluation. You may not find a forum that meets all of these criteria, but at a minimum a forum should allow signature links and be fairly active.
Next up, we’ll discuss how you can establish yourself on a forum—without angering the natives.