I have a little cookbook I sell. I used to use two rack cards and a Word doc, but I recently got 4x6 postcards made. I printed them mostly to use as covers of the cookbook, but they are formatted like a regular postcard so I've also put them in the rooms for guests to use. I punch two holes and tie them together with curling ribbon.
I sell them for $5 each and they sell pretty quickly... when I'm not giving them away!
When I have a charity I'm willing to support, I give them a gift basket with a pound of my house label coffee, a cookbook, and a few other small things.
=)
Kk.