Apparently the "You've Been Elfed" tradition has been going on for awhile and I only found out last year after the Holiday's. We have a couple of new neighbors this year so I thought it would be nice to Elf the new neighbors. There are lot's of cute You've Been Elfed signs on the internet you can search for and print out to use for yourself. I found one I particularly liked here: http://www.tipsfromatypicalmomblog.com/2012/11/weve-been-elfed-free-printable-door.html This site has lot's of other fun stuff also.
I wanted a couple of tags to attach to my gifts so I made a couple to match the signs.