Start with the reopening time
Decide when the team must be working again and plan backwards. This sets the crew size and whether the move is phased.
Give every item an address
A numbered floor plan and matching labels on crates, screens and chairs remove nearly all moving-day questions.
Treat IT as its own workstream
Agree who disconnects, who reconnects and when the network goes live in the new office. Back up before anything is unplugged.