Different things make different people happy, this will be elucidated in your responses. I have found that if you can find something that peeks your interest and keeps your mind occupied, happiness usually follows. In other words, try not to let life bore you. Alot of people just kind of float through the years with no purpose. Find a cause that you believe in and go to work.
Don't we all make compromises in some form or fashion throughout the life cycle? Compromise is a part of life that is ever present in your career, or relationships, or what you are going to eat for lunch. The key is to make compromises that you will be O.K. with years later.
I think that the answer to such a question is going to be a subjective one and/ or one that brings out a great deal from those who respond. Such a question helps to define our very existence and is extremely relevant to who we are and in what we, as individuals, believe. Some will argue that money and financial security is one of the most determinant elements in how one approaches their own happiness. If an individual has to work multiple jobs in order to achieve financial security, then there might be a challenge to the pursuit of happiness as there is much where happiness might be absent. Yet, if someone is doing this for the benefit of their families, then perhaps the pursuit of happiness lies in their betterment and their security. In the end, individuals have to determine their own criteria for happiness and act upon this set of standards in determining if the pursuits of happiness is one that is a worthy endeavor or one that takes away from their sense of contentment.
I think that this varies completely from person to person. There is not really any one thing that makes everyone happy.
For me, I have pursued happiness by trying to help create a stable and happy family. In pursuit of this kind of happiness, I quit my job teaching full time so that I could be the stay at home parent for my kids. This is not the same choice that everyone else would make.
I also pursue happiness by trying to learn new things. I like to read books about topics that interest me (right now I'm reading one about major scientific discoveries having to do with evolution). I also have continued to try to learn new languages.
So, I pursue happiness by trying to learn new things and by trying to help create a happy family.