I am often asked, “How often should I blog?”
Those who study industry trends generally recommend bloggers post new blog entries at least every fourteen days. Why? Posting on a regular schedule keeps your content fresh and interesting.
Search engines love blogs for this reason. Google and other sites will visit blogs often to look for new content. The return to learn how often to expect new content from your site. By writing new blog posts on a regular schedule, you will train the search engines to return more often.
There are a few bloggers who post daily or even more often than that. Seth Godin comes to mind. His posts are short, maybe two or three paragraphs on a topic.
Whatever schedule you choose for yourself, be consistent. It is best to under promise and over deliver. If you write an extra message or two, it is a bonus!