What are some affordable, do it yourself halloween yard decorations?

Ive already done the ghost flying in trees, and im making the milk jug laterns, and tomorro im doing the cardboard headstones, and i even myself came up with the idea to make bats out of coca cola bottle with cardboards wings ect. But the house im decorating looks like with another paint job it could be right out of a movie of a haunted house. So even with the decorations i have, i seriously still feel like the outside of the house and the yard is missing things. Im going to possibly do a scarecrow, and im deffanately going to put cobwebs with spiders in them up. But any advice on anything and everything that would be very very cheap, and cool, and pictures if you've got them thanks!