I have much more to say, but at the risk of sounding like an utter cornball, if I only said one thing then “Be Happy” would be it.
Only when the self is content, can we allow others to feel the same. Happiness is the only virus we all need to be susceptible to. Infect others – be happy.
In my own life I have found that when I am truly happy, I feel no need to harm, limit, frustrate or denigrate others. When unhappy, well, we all have the unfortunate potential for the negative.
It has only taken me a half century to figure this out, so this is my gift, don’t waste the first 50 of your life finding ways to be unhappy.