If you want to add happiness and wealth to your life, there is a very good answer: just contribute to a team.
Not only work teams or sports teams, but also families are teams. Humanity can be seen as a team. Even people who pass by can form a team with you.
When you contribute to the team, the power of the team will give you more happiness and wealth.
Contributing to a team doesn't need to be complicated. Sometimes, it's just a simple sentence. For example, when you're buying something, giving a small compliment to the cashier will leave a deep impression on them.
Don't you remember, how someone's unintentional praise once made you remember him for a long time?