There are a lot of good rules of thumb out there.
One of my favorite is treating others as you’d like to be treated.
Take the angry guy, in this video, for example.
He’s clearly not treating others very well and immediately suffers the consequences for doing so.
I mean, any time I get to see an angry pedestrian get instant karma, I’ll take it.
No you know how it feels, angry man.
(via ChrisSmithOne77)