File signed agreements, keep order receipts, bundle handoffs. Every one is ready to run, and you can adjust it in plain language.
Email the current proof to its reviewer and note the revision sent.
Your reviewer gets the current image or PDF and a clear question. Your review card shows which revision you sent.
Send the current draft to its reviewer and log the handoff on the card.
Your campaign reviewer gets the current draft and a clear request, while the card shows when the email went out.