Work smart means you are not only use your strength but you also need your brain to think what you can do to have more. That will make you more creative to search for a new idea that can bring you more chances to get what you want. Not many people realize this and still use their strength to work while they forget that they can use their brain to search for opportunity to achieve their goals.
Work smart will open more ways to see the chance to do something. He can delegate the work and do other things that help him achieve the target.