Best way to move a VM to new hardware

I've got a SBS 2011 VM running on ESXi 5.  The hardware is not adequate and the performance is slow.  I want to move the SBS 2011 VM to new hardware.  After installling ESXi on the new hardware, what is the best way to move the VM.  It's pretty large, and it's a production server - so I'm looking for fast and efficient.  What are the most common problems when moving a VM to new hardware?  Thanks!