I have recently updated and revised my DBA Best Practices Checklist, which is hosted on www.Simple-Talk.com. The goal of the list is not to cover every aspect of SQL Server administration, but to hit the highlights. In addition, not every item in the checklist will apply to every SQL Server instance, under every circumstance. So like any list of SQL Server best practices, don’t forget that they may or may not apply to your environment.
If you would like to add your own items to the checklist, or to provide other feedback on the checklist, please do so here, and I will try to include your feedback the next time I update the list.