I really attempted to keep our cards simple this year. Of course "simple" kind of turned into "Well, they have to have embossed backgrounds." Beyond that I reminded myself that every detail eventually had to be done 50 times..so just pick a few good ones...
I think my favorite part might have been using name tags as address labels...loved the bright red on the green envelopes.
But what I loved the very most was sending them on their way to our friends and family.