Happiness is an inside job. And relying on your brain to be happy is futile.
The brain's not going to do that for you, simply because it is not wired for it. It's forever looking for what's wrong.
It's job is to enact the fight or flight response.
Whereas it is your job to differentiate between suffering and stress. If you keep following the trail of your stress, it will take you to your deepest fears.
More accolades, more business, more wealth is not going to make you happy.
Once you start to enjoy each moment, and let go of the 'stories' that the brain makes up when you're tired, stressed, pissed off or exhausted, then you find real happiness, almost instantly.