Including internal links is SEO technique #7 in the blogging for money series.
In short, this is all about linking to other related posts within your blog to the topic in the post at hand.
This is easier than ever with a WordPress plug in. The plug in will scour your site to find other posts with similar words and content and provide links to other similar posts.
Linking to yourself is not as powerful as having someone else link to you but it does give your site internal connectivity.
When someone comes across something they like at one post, chances and hopes are they will click through to other posts. Telling them where they can go (not where to go) is a service the interested reader appreciates.
Including internal links can keep readers at your site longer giving more visibility to well placed and relevant ads you might have at your site as well.
And that results in higher return for your effort.
Contact me. You know you want to.