Need some advice on hard disk hot-add

Hello All,

VMware vCenter Server 4.0.0
vSphere 4 Enterprise
Windows Server 2003 Standard Edition SP1 (32-Bit)
VM Version: 7

Planning to add another 500GB virtual hard disk to this file server. Considering hot-add (for the first time) to avoid down time. I don't expect problems, but it's always good to be prepared.

I would like to hear your best practices / lessons learned / actual experiences. What precautions should be taken? etc...

Thanks to all who reply!