Happiness can be achieved simply. through Wisdom, Virtue and Pleasure.
Without any Wisdom you will not be happy, without any Virtue you will not be happy and without any Pleasure you will not be happy. The amount could be different for each individual but some, even a little could be enough. Think about life and creation for Wisdom, do something good and kind for something or someone for Virtue, Indulge yourself and enjoy what life has to offer for Pleasure, It is not that difficult, only requiringthe correct mind set.