Here is my personal philosophy on happiness.
Happiness comes from within, it is a state of mind. My experiences in South Florida, encountering so many obnoxiously rich, unhappy people, has been that no external stimulus - material or otherwise - can bring true happiness. Perhaps a momentary glimpse, but not the real thing. The novelty, along with the "new car smell" will wear off eventually.
One's internal emotional thermostat has the power to prolong happiness or send negative emotions packing. Emotions, both negative and positive, will inevitably occur. It is up to you to cultivate the good and weed out the bad.