Your best bet in a business dining situation is to use your common sense in all things. Even if you're uncertain about the etiquette, simply keep in mind that if you remain polite, neat, and pleasant, you'll most likely come out smelling like a rose.

If you're uncertain which type of wine goes with your meal while dining in a fine restaurant, don't hesitate to ask for help. Most fine restaurants employ sommeliers, wine experts who can make specific recommendations depending on the kind of food you're eating.

If dining with a client, you should always pay the check. In order to avoid the inevitable struggle for the bill, arrange things in advance so that the waiter gives the check directly to you, or that the check is delivered only after your client has left, so that you take care of it at your leisure.