Only move empty racks and cupboards. This prevents damage to the rack as well as to invaluable server equipment. Clean and repair everything prior to reloading the racks. Take the time to do it right.
Moving full racks and cabinets can be a disaster, leading to excess downtime, and the extra cost cost required to replace damaged equipment. At this stage of the game you can see the light at the end of the tunnel, but don’t take shortcuts. This is the event that everyone has been waiting for and you want it to be a success.