8bc4526d_earch_Engine_Optimization_Tips__Why_It_s_A_Mistake
[Mistake] Not growing your site content. [Solution] Get a Blog or create an Articles/Info section on your site and add helpful/informative content regularly. [Why It’s A Mistake] 
The engines like fresh content and so do site visitors. It gives them a reason to return. Not updating content makes your site dated and you lose opportunity to increase rankings and further engage site visitors.
Blogs Of SEO: June 2011 | SEO Blogs | SEO Basics | Search Engine Optimization Tips
Why It’s A Mistake