That's a good idea, making tags out of cards. But last year, I got hardly any cards. Or the ones that did come were family picture cards. I even bought a cool card display thing to put them on and it was soo very lonely. But I also bought that to use for my craft sale. I did buy designer paper from SU, Snow Festival from the new mini. Two pages of that paper can be just cut into tags (with cardstock too) and I did that for my own use. I think I got 24 out of the two pages? So now I have my own tags to use (and my daughter to use too-she comes home with loads of last minute gifts and that's where my extra tags go).
For tags last year, my sister got large shipping tags and glittery letters and just put our names on the tags with a sticker or cut out that was Christmasy. They were very pretty. I liked that idea.