Detailed best practice design for IT Services
The Windows Server System Reference Architecture Website is a very powerful resource providing you with detailed best practice design for you Device Services, Core Services, Security Services and Supplementary Services of your IT Infrastructure.
As an example here's what you have under Security Services:
Firewall Services
Introduction | Blueprint | Planning Guide | Build Guide | Operations Guide
Backup and Recovery Services
Introduction | Blueprint | Planning Guide | Build Guide | Operations Guide
Certificate Services
Introduction | Blueprint | Planning Guide | Build Guide | Operations Guide