If you’re having a day where you don’t feel emotionally well, spend your moments in the day with a priority to give sincere compliments to others. It can help the people that you meet feel better. You will get good feelings, because you made someone else smile.
Another way to look at this is the pivoted focus towards others away from yourself. You never know when people are going through something dark, and a simple kind word can make some improvement on that situation.
If we all showed that we care enough to say something positive about people we interact with, the world would be blooming with brighter emotions.