Specifically, to optimize blog entries for search engines, MoreVisibilty advises its business clients using blogs on their site to focus on a very limited set of keywords in any blog updates. The main keywords should appear it the title of the blog entry, and the same keywords should also be mentioned one to three times in the blog entry itself, based on its length.
Read more at http://www.internetretailer.com/dailyNews.asp?id=16268.