I saw an interview with Earl Campbell the other day and he said something he always tries to remember is something his mother told him growing up and I liked it so here it is:
"It doesn't take that much to be nice to people."
I think being negative and ugly takes a lot more energy than putting on a smile, even on bad days. Smiles are contagious.
Anyway I thought that was nice of him to say and considering how much he has been through, it struck a chord with me.