"Realize that true happiness lies within you. Waste no time and effort searching for peace and contentment and joy in the world outside. Remember that there is no happiness in having or in getting, but only in giving. Reach out. Share. Smile. Hug. Happiness is a perfume you cannot pour on others without getting a few drops on yourself."
Ironically, this quote (which alludes to not needing to buy anything to make yourself happy) comes from a man who wrote The Greatest Salesman in the World!