As Nick from seoconsult writes:

Internal linking is an important part of SEO which can often be overlooked. This is a shame, as it’s far easier to solidify your internal links than it is to nurture links from external sites. A site with the right internal structure can score a higher ranking than a badly structured site with external links. Also, internal links are guaranteed to come from the page with the most authority on your business – your own.

If you have Blog that is powered by WordPress, you are lucky: There are several plugins that can help you build more internal links on the fly. It is called SEO Smart Links .

How does it Work?

SEO Smart Links scans your blog for keywords or phrases that match the titles of your posts and pages by default (and you can enable categories and tags matching too). These phrases are then turned into the links. The matching is case insensitive and the original case is preserved.

So If I mention “What Do I Have To Do For SEO With Bing?”, which is the title of one of my posts, it will be automatically converted into a link. This plugin improves your site’s interlinking markedly.

If you do not use wordpress, you still should consider building internal links. Just go over some of your older pages and add some internal links. While doing this you may also want to just add some updates here and there, which will be very favorably noticed by Search Engines.

Actually keeping your site up to date and adding new content on a regular basis is one of the most important SEO factors. If this seems too time consuming for your team, you can easily outsource this using services like odesk.com.