Send a generic letter out to all givers informing them that you will no longer be receiving gifts, then give them alternatives such as the llamas or other charities to give to in your names. Otherwise, either say thanks and give the stuff away, as others have said, or be blunt and say thanks, but no thanks. I've used the "I'm very picky about what I wear, even my daughters and husband can't figure out what clothes to buy me, so please don't try" and it works. Though, this year my big sister DID take a chance and I LOVE the blouse she sent me! She understands what I like!