Where can I go for more information on modeling and UML?
Here are some books that should help you:
Scott W. Ambler. Agile Modeling: Effective Practices for Extreme Programming and the Unified Process. John Wiley & Sons, 2002.
Eric J. Naiburg and Robert A. Maksimshuk. UML for Database Design. Addison-Wesley, 2001.
Jill Nicola, Mark Mayfield, and Mike Abney. Streamlined Object Modeling: Patterns, Rules, and Implementation. Prentice Hall PTR, 2001.
Scott W. Ambler. The Object Primer 2nd Edition. Cambridge University Press, 2001.
Martin Fowler and Kendall Scott. UML Distilled: A Brief Guide to the Standard Object Modeling Language (2nd Edition). Addison-Wesley, 1999.
The Agile Data Web site (http://www.agiledata.org/) has some good material related to database modeling.
Where can I go for more information on Agile Modeling?
Start your journey at Scott Ambler's Agile Modeling site: http://www.agilemodeling.com/. He has many links to both books and articles.