One thing I have learned working with people for a long time was smiling.
Sure, you learned how to smile, or even naturally did it as a child. Observing people for a while though, I have been amazed at the amount of forced “genuine” smiles. I laugh because some folks just don’t seem to realize people can tell the difference. You think we can’t see you clenching your teeth?
I dare you: try a genuine smile once a day. It”ll be an education!