Knowing who to tip, how to tip, when to tip, and how much to tip
is all very complicated. I imagine one could probably become a
tipping etiquette master after a lot of life experience;
however, if you never left your small town before going to
college you may want to do some research. You do not want to be
that guy (or girl) who doesn’t tip when you should.  A lot of
people are dependent on receiving tips and can earn close to
half of their money based on your tipping. So, let us start with
WHO you should tip. Usually you tip all people who serve you. If
you do not know if you should tip, try to think about these
three categories: food service, transportation (kind of), and
personal service.  Food Service: The food service is probably
the most common place where you tip or here about tipping. The
kinds of people you should generally tip in these situations are
the waitress or waiter, bartender, busboy and things of the
sort. I have also heard of people tipping the chef at a
restaurant if you want to be genero