To help me get in the Halloween mood, there are certain things I try to experience every year. This isn't an exhaustive list, but does cover the basics, at least for me.
Food & Drink
Hot Apple Cider
Nightmare Before Christmas
Rocky Horror Picture Show
Mercury Theater radio plays:
Danse Macabre by Camille Saint-Saëns
Decorate the yard & house at least a little
Carve at least 1 pumpkin
What gets you in the mood for the spookiest of holidays?