A good overview and introduction on how to organize your data in a database can be foud on datamodel.org.
Purpose
The primary purpose of DataModel.Org is to provide a means of communicating the needs and experiences of Data Modelers, Database Designers and Data Architects. It also is a place for companies needing our services to locate database consultants.>>
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http://www.webmasterbase.com/article.php3?aid=228.