When you feel that your days are gloomy, try this one small step. First, smile on your self at mirror. Develope your smile as wide as possible. Then smile on people you see. Even those who are gloomy like you were, can not remove that smile. Rest assured that your day will be more wonderful.
I smiled on them when they had no confidence and the light of my face they did not cast down. (Job 29:24)