Pick a variety of ingredients to include on your board - soft, crunchy, different colors, different flavors, etc.
Place small items, like candy corn and candy pumpkins into a bowl on opposite ends of the board.
Fill in opposite large sections with items like pretzels or large wrapped candies.
Fill in small sections with items that can be stacked, like gummy worms.
Arrange other candies and items around the board to cover the space.
Decorate with items like candy coated eyes, plastic spiders, skeleton hands, etc.