I spent 15,000+ hours in the past 7 years studying and researching human psychology for a living. And, no, I can not read your mind. But here's my ultimate guide to a happier life.
5 proven habits for happiness to live by:
Prioritizing sleep (30yrs+ in the making)
Exercise (8yrs+ yoga)
Meditation (200hrs+ Headspace, Vipassana)
Reading (I read advertisement as a young child not having money to buy books)
Journalling (30yrs+ experience writing tearful journals of relationship turbulence and it is getting better)
Happiness is daily habits. Even better if you invite others to join you, so you have accountability and lots of fun.
No matter whether you are in the best or worst stage of your life, with a loving relationship or not, struggling with a career or high on fame,... you could still be benefited from these habits.
The longer you practice each one of these habit, the better it becomes at helping you overcome your darkest days.