Rubber Stamps, what would you use them for?

I had a small obsession with rubber stamps when I was young and loved the idea of ordering a unhc of stamps for anything.... Now a little older I am no longer obsessed but certainly know that they are useful little things to have around the office or anywhere in your business.

You can use rubber stamps for a million things but one thing I realy like it for signing off work and makring it approved with a date.

What do you and would you use one for?