1. Forget sunscreen on the first day (or any day).
3. Do no research and don’t have a plan.
Also, if I am going somewhere with a lot of history, like, everywhere, knowing something about it makes the trip so much better. My husband obsessively Wikipedias before we go anywhere. I used to think he was nuts until, one trip to New York City (a while back), he's all pointing out the interesting buildings he's read about and I'm all, "that's pretty, is it famous?"
I’m not much of a shopper in my regular life so shopping on vacation is really just a habit. My mom is a vacation shopper. School field trips always involved bringing money for the gift shop so you could get things like giant pencils with “Baltimore” written on them.
5. Ignore Basic Physiological Needs.
The first step of recovery is admitting you have a problem, I guess. I may not have vacationing down yet, but, I'm willing to practice...