What You Can Be For Hallowe’en: Twenty-Eight

This one may not be as straight forward as a tutorial on a particular costume, but it's a great resource for ideas and inspiration - the vintage Hallowe'en group over at Flickr. Many of the images in this group are lovely old Hallowe'en cards (some of which are kind of freaky, as I find the above), but there are photos of people in costumes mixed in as well.