Just a quick post to highlight a couple of great articles on the Ask Premier Filed Engineering (PFE) Platforms Blog in relation to Hyper-V 2008 R2 SP1 and Hyper-V 2012 / 2012 R2 best practices.
Windows Server 2008 R2 SP1 Hyper-V Best Practices (In Easy Checklist Form)
Windows Server 2012 Hyper-V Best Practices (In Easy Checklist Form)