College sweatshirts are 'casual' instead of dress up. Sleeping on the couch is a no-no. Naps are no longer available between noon and 6 p.m. You get your news from sources other than USA Today, ESPN, Sportscenter, and MTV News. You find yourself reminiscing fondly of 2-hour Calculus exams.
Wine appreciation expands beyond Boone's and Mad Dog.
You actually eat breakfast foods at breakfast time. Grocery lists actually contain relatively healthy food. When drinking, you say at least once per night, 'I just can't put it down the same as I used to'. Golf is beginning to seem a lot less silly.