Treaty of the Grinch
I have a treaty with the members of my family of origin: Don't buy me any Christmas or birthday presents, and I won't buy you any. It works really well, and saves me a lot of stress and hassle.
You should try it.
Yes, I do get birthday and Christmas presents for my kids and my lovely wife. But I try to make sure that the birthday one is 'more better' than the Christmas one.