See also: 10 Tips for Being a Wedding Date
10. Do make use of your amenities.
From a logistical perspective, hooking up while on vacation is either a piece of cake or a nightmare. If there's a hotel or a guest room involved (and no poorly behaved roommates), you don't have to worry about a stranger learning where you live or going back to their potentially awkward living situation. You may even have a hot tub, a fancy shower, a limo, or any other number of potential hookup places that aren't available when you're home.
9. Don't get attached.
While there's nothing that says vacation hookups can't turn into serious relationships, the odds are stacked pretty well against it. The two of you presumably don't live in the same place, and you probably won't get to know each other all that well. When you step on that plane (car, bus, train, whatever) for the long ride back to reality, let the romance become a fond (or not) memory along with the rest of the trip. If both parties are interested in continuing beyond the vacation fling, then it's obviously fine to keep in touch, but don't get too caught up in it.
8. Do be nice.
Even though you might never see your vacation lover again, you don't have to be a jerk about things. We're not saying you need to marry the person, but you probably shouldn't kick them to the curb in the dead of winter. Aside from the whole karma thing, keep in mind that you probably only have a vague idea of who the person you're dealing with is, and treating the wrong person poorly can land you in some pretty bad spots both on the Internet and in the physical world.