After moving verify that all mail gets forwarded to your new address

Use your previously-created checklist to make sure that everyone you notified about your move has, in fact, started sending your mail to your new address. If something is missing, follow up immediately to make sure mail isn't still being routed to your old address.

You might also consider getting a "mailboxes" type address to use for all your mail. If you have enough time, you can do this well in advance of moving, and make sure all your mail goes to the mailbox address. Then you will have less to worry about during your move. Note that if you stop receiving mail at the mailbox address, there are some limitations on mailbox forwarding from these mailbox company addresses.