To achieve happiness it is important to know the meaning of life clearly. If we were simply created for the dust heap of temporary galactical existence, then human life and endeavor would appear futile. Sadly, the purpose of existence still remains largely a secret, undiscovered by many fellow human beings. Yet this secret is explained in the Qur'an and other Divine scriptures before it, but how many have noted it or understood? 'Wa maa khalaqt -ul-Jinna wal-Insa illa li ya'budoon'
(And We did not create Jinn or Mankind except to serve and worship Me)
The Creator of this universe, therefore, cannot be ignored. Happiness is connected to fulfillment of one's noble destiny. That is why people who set their life's goals on satisfying their own desires, chasing false gods and material dreams before they get old or die, ultimately miss the great highway to happiness.
And for every highway there is a map, and warning signs on the road.