I find it very satisfying to tell someone they look well, that a colour is nice on them, or they have lovely shoes or make up even.
When you stop someone in their tracks, it makes THEM think for just a minute, it makes me feel like a nicer person for taking the time and it generally creates a nice feeling on both sides.
I also try to smile. I love the phrase "I'm still wearing that smile you gave me this morning". So stop. Think. Do it. Move on. #TryIt #TheLittleThings