I spent years as the conference chairperson for a provincial organization. As such, I was in charge of selecting swag and things I am still using are:
post-it notes (with little writing)
a toque
6" ruler
lightweight cloth bags
and my all-time favourite - a rip-stop nylon bag that folds up into a small, flat pouch; I scored three of them and keep them within easy grabbing range in my car so there's always one in my pocket when I go into any store. They hold more than a regular grocery bag.
The advertising trinket that I've had the longest is a bottle opener and I'd be upset if it were to be lost.
I also save pens but have become somewhat of a pen snob and prefer what I like so saved pens are not being used.
Onebyone, I am trying to imagine what you would rubber stamp and then give away on a fabric table. Won't people just cut off the piece with the stamp on it? The whole idea seems like extra work for no gain.