1. Not having "SharePoint" in your job title.
2. Creating too many Web applications.
3. Making changes in IIS manually.
4. Failing to use the SharePoint solutions framework.
5. Inadvertently installing a standalone server.
6. Using the default SQL DB growth settings.
7. Failing to document the farm configuration.
8. Manually changing SharePoint databases to "fix" things.
9. Believing that PowerShell is only for developers.
10. Disregarding SharePoint capacity planning recommendations.
2. Creating too many Web applications.
3. Making changes in IIS manually.
4. Failing to use the SharePoint solutions framework.
5. Inadvertently installing a standalone server.
6. Using the default SQL DB growth settings.
7. Failing to document the farm configuration.
8. Manually changing SharePoint databases to "fix" things.
9. Believing that PowerShell is only for developers.
10. Disregarding SharePoint capacity planning recommendations.