On Tuesday, we were Boo'd, sometime early in the morning by a very clever person. This is one of my favorite Halloween/October traditions - in the dark of night, or early morning hours, you go around to three houses in your neighborhood and leave them a bag of treats and a cute little note. All anonymous, and very fun.
Melissa Summers at AlphaMom put together a great piece on how she super-craftily decorated their bags, with additional links to more ideas.
Last year, I took this tradition to work, with some moderate success. This year, I suggested to my Dad that he Boo his friends at his retirement place. The whole thing is fun and in our family, makes Halloween last longer than a day.