Going for a spooky vibe this year... (feel free to comment or critique, I'd love to know what I can do to improve!)
Day 1: Ring
Humble Bundle is a great little site! I've been using it since it first started out years ago, when it was a site that only offered video games at name-your-price in order to raise money for charities. Their products are always legit.
Just follow the steps @CLCanadyArts wrote out and you'll be good to go. (Just bought mine thanks to this thread!)