A: Every gift should be acknowledged with a thoughtful note. For guests who give money, tell them what you expect to spend it on: "Thank you so much for your gift. We're planning to use it to complete our stemware set, and we'll think of you when we make a toast to good friends." Don't mention the specific dollar amount, and avoid notes that sound like form letters. And send your note in a timely manner—it should arrive before the canceled check.