These responses are all useful. What works for one person may not be what works for others. So have a pocket full of things to try, but put your heart into the attempt. I have always found smiling makes me feel better. It's the old saying "fake it to you make it.". If you are out and about and you smile people will respond with a like response. And someone already mentioned generosity. Pay it forward...there are a tons of people worse off than you and who knows your helping someone may bring real joy to their lives at a time most needed.