I think that far too much emphasis is put on happiness these days. It's a relative state not an absolute state and so consequently it can never be achieved as a permanent state.
I prefer to focus on cheerfulness. If you get that right then pretty much everything else falls into place.
If you're interested you can read more about why the pursuit of happiness is such a misleading venture here:
Fallacy: The Pursuit of Happiness
Take care,
Nick