Having a website with a blog that is constantly publishing good material is always a great way to improve your SEO, but you need to start considering an extra couple of blogs that create more content and link to your main site. The important thing is that all of your blogs need to be unique and you should not copy the material from one blog to another.
The more blogs you have online posting material and back linking to your main site, the easier it is to increase and boost your presence in search engines.