Those are all neat ideas.
Mine is much less sophisticated. I tape them to the back of my door (like whatever the main door to my home is where ever I'm living...I've moved three times since starting to do this).
I end up having the door totally covered in cards and I just leave them up all throughout the year. People always comment on it, especially when it's not the Christmas season...but not too many comment in a negative way. I just love that it's a little piece of Christmas for me to see throughout the year.
(never ruined a door btw)
Looking forward to Christmas a little early this year.