Thanks to Microsoft Consulting Services and SharePoint Customer Team, part of the core product team, for providing us best practices guidance to avoid common pitfalls and keep our Microsoft Office SharePoint Server 2007 environment available and performing well:

1. Operational Excellence

2. Team Collaboration Sites

3. Publishing Portals

4. Search

5. My Sites

6. Developing Custom Applications

7. Additional Resources

Hope this would server as a reference.