One very, very important thing to realise about four-way stops (or all-way stops), is
that you do not always "Yield right-of-way to the driver on the
right" if you're an international traveller. This is only true in countries
where cars drive on the right. As international travel is always increasing, it's important
to raise awareness that where cars drive on the left, the default rule is "Yield
right-of-way to the driver on the left".