I have given "Something old, something new, something borrowed and something blue" as wedding gifts and everyone seems to love the idea. I usually give an antique bowl or dish bought from a thrift store but still beautiful, something new is maybe an ice cream scooper or whatever comes to my mind, something borrowed is a $5 bill and something blue is whatever I see that is blue. I do this when a gift is expected but I don't want to spend much.