Spend my last hours with my kids.
Spend as much time with as much family as possible. I also REALLY want to experience the Northern Lights but if tomorrow is my last day that doesnt leave much time.
I would tell all those that I love that I do love them. I would also make arrangements for the care of my dogs. Then I would head to the beach and watch the sunset over the water with and either a beer or a glass of wine in hand.