Don't aim for happiness
Aim for satisfaction instead
Happiness are the fleeting moments of joy you experience
They don't repeat themselves, even if you put yourself in the same situation
Therefor, aiming for happiness is pointless
It's not sustainable
It's something to be alert for, thankful for
But the real pursuit must lie in satisfaction
However you define that
Satisfaction = effort worthwhile
Deploying your first website
Graduating your program
Fixing the drawer in the kitchen
Helping something
Define 'worthwhile' anyway you like
The point is that doing effort,
with a worthwhile payoff,
ultimately makes you a much sustainably happier person