I'm looking for a word or category for certain practices: In New York City, if you have an errand in a distant or even a near part of town, you will try to think of other errands you have to do in or near that area, so as to be more efficient. I was once told that there is a word for this sort of habit or custom, a word that categorizes it. And, I suppose, there must be a word or a category for that sort of word. Do you have any idea what these words/categories might be? I don't even know where to begin to look. Thank youl