By writing and submitting informative and interesting articles, on your topics of interest, free long term publicity for you and your blog are achieved.
Here is a website that lists many article submission sites, where you can send your columns, posts, and articles. Most of the listed sites are free for some or all of your written submissions.
The various listed directories are also categorized so your article can be targeted directly to its intended audience.
Articles are selected, from the article submission sits, by many website owners for inclusion as content on their own websites. When your article is chosen, and placed on another site, there is link right back to your blog.
You gain some of their visitor traffic for your own blog. Because the site using your article is highly likely of the same topic as your blog, the new visitors could become regular readers for you.
You also gain the added link popularity power for your blog in the search engines.
Everyone wants a little added Google Juice.
A few extra readers are a good thing too.
Now all you have to do is start submitting those great articles today.