In my case, sign the signature sheets.
Done, and shipped back to the publisher. In fact, cover artist Wayne Miller and I met for dinner last night, and he signed the sheets for the lettered edition. So Other Gods is that much closer to completion, and I expect that by May it will be running loose on the streets. Almost certainly, I will have copies to take to Mo*Con with me in June. I can bean unsuspecting passersby with them.*
*For this activity, I shall require the hardcover edition.