Provisioning Services for XenApp Best Practices
http://support.citrix.com/article/ctx120464
Top 10 Items Found by Citrix Consulting on Assessments
http://support.citrix.com/article/ctx119686
Provisioning Services for XenApp – Reference Architecture
http://support.citrix.com/article/ctx120512
Technical Introduction to XenApp 5 and Windows Server 2008 http://support.citrix.com/article/ctx118437
Provisioning Server High Availability Considerations http://support.citrix.com/article/CTX119286