I regift toys. We have a large family, so often the kids get 2 similar or identical presents. I normally put one in the present box, so it is on-hand for the next party. I usually buy clothes to go with the toy when I regift it though. For example, I went to a 1st birthday on the weekend, I had bought a beautiful cardigan for the birthday girl, and added a toy from my present box.
If we go to a friend's house for dinner or similar, I will generally take a bottle of wine that was given to me. More because we only drink socially, I would prefer to drink it with my friends than leave it gathering dust.
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