tip number one: plug in a radio with a socket adapter and turn it up.
it needs to be a type of radio that will go on when you turn on the
power at the light switch.
tip number two: use lighted handle switches. they are safer to
newcomers and visitors and will tell you when they have power on them
if a bulb or radio is plugged in.
also handy when i am trying to figure out why i didn't replace them and
test them one at a time.
tip number three: read up on four way switches just in case.