Saying hello with a smile in your face is one way to uplift the spirit of the people you are meeting whether in the external or virtual world. According to www.rd.com saying hello is an acknowledgment of existence. It is a pause, however brief, to affirm another person's worth. In return, you become a person to them, too. According to research saying hello can raise productivity. A study on the topic had teachers in middle school greet their students individually every month. The short interaction raised the students' productivity by 27 percent. Studies have also shown that saying hello can save marriage. Common courtesy isn't that common. When did you last say hello to your spouse?
Of course don't ever forget to say hello to yourself each morning. You are the person who need it most.