Some old fashioned, but true rules I try to follow:

Our lives begin to end the day we become silent about the things that matter.
~ Martin Luther King Jr.

Anyone who has never made a mistake has never tried anything new.
~ Albert Einstein

We make a living by what we get, we make a life by what we give.
~Winston Churchill

If you obey all the rules, you'll miss all the fun.
~ Katherine Hepburn