Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Return corrected proofs for another check after every fix is done.
Your reviewer gets the corrected proof and completed fixes when the last correction is done, so the next decision does not sit in rework.
Reopen your proof review task with the corrected PDF.
Your reviewer gets a task ready to review, with the replacement proof and its version named in a comment.