#3 Host a 'Scary Dog Movie Night'
This one really gets into the spirit of the day. Pick a scary movie (see some of our suggestions here), set a room up as a home theater with lots of comfy pillows, a self-serve concession stand with bone cookies (find some recipes here) and other treats, bowls or paper filled cones of unbuttered, unsalted popcorn, and decorated bottles of water. Be sure to schedule an intermission for "bathroom" breaks. Buy, print-out, or e-mail invitations along with printable movie tickets for your guests.