My favorite medium is "stickers' and after "Mrs. Grossman's" my favorite manufacturer is "K & Company". That is what I used for the first two cards. The first is made to look like an ornament and is decorated with poinsettias and holly.
The second is a beautiful angel overlaid on music themed paper and accented with a tag, rub-on text and more holly sprigs.
The third card is a combination of stickers (the tag with text and the 3D poinsettia) and a gift tag overlaid on patterned paper.
These are all simple to make but are quite effective and festive. Happy holidays to all!