A Snapshot from http://www.processor.com/editorial/article.asp?article=articles/P3014/23p14/23p14.asp&guid
STEPS :• Perform a proper risk assessment prior to upgrading production systems to Windows Server 2008 and/or Vista SP1 (www.microsoft.com). • Back up all the data on the production systems you’ll be upgrading to Windows Server 2008 and/or Windows Vista SP1. • Develop a rollback plan prior to upgrading production systems to Windows Server 2008 and/or Vista SP1. • If feasible, pilot test Windows Server 2008 and Vista SP1 prior to putting them into production. • When buying new servers and desktops, think two to four years out when developing the specifications for the machines to accommodate Windows Server 2008 and Vista SP1.