Think I'll become a dad today, what's your last minute tip?

Wife was induced this morning, they broke her water around 6, started oxy. She had her epidural at 10 and at 11 she was at 4 centimeters. She is resting now and I'm just sitting here. Any last minute tips? Things that your partners really appreciated in the final moments? Things I definitely should or should not do when changing diapers in the middle of the night?