When it's done in a sincere and truthful way, it has a tremendous impact on the recipient.
I encourage you today to look for the best in everyone you meet today. You may surprise yourself at how frequently you find it. And then, genuinely, sincerely, acknowledge them. Put aside your ego - it's about them, not you - see the greatness in them, and let them know about it.
Try it today. Make someone's day. And let me know how you get on.