Internal links can be just as important as backlinks when it comes to blog SEO, the big difference being the amount of control you have over your internal links. You can install a plugin that will add links to related post automatically; however, you have little control over these links.
If you have the time, and if you have a good handle on where you blog has been in the past, it can be a much better idea to add links to your previous posts yourself. If possible, place the links within the content of the post rather than just tacking them onto the end of the post.
As time goes by, don’t be afraid to review some of your older posts with links forward to new posts with relevant content. This can be particularly useful when later posts contain more up-to-date information. The older post is likely to show up in search results so any traffic that flows from those results should find a link to the post with up-to-date information in a prominent place.
Controlling your internal links means you can control where the ‘link juice’ flows. Do this as naturally as possible.
