Happiness is an individual and subjective experience. How someone defines it and views it, is what happiness is to them. A moment of happiness for a teenager or adrenalin seeking adult could be a going down a high thrill roller coaster ride. For others (those of us more ground based) this could be a very unpleasant activity. There is not one universal accepted experience or state of mind that defines happiness. An individual concept of happiness is formed by subjective interpretations of events and expectations set forth by themselves or others,
If the goal is become a happier person, than you need to clearly understand what happiness means to you. If you don't, you may be chasing the concept of happiness and the feeling may be elusive. If you allow that, happiness will not be obtainable and you will feel unsatisfied.
The first step is to look at different life areas you may be unsatisfied with. Here is an exercise that I suggest. Look at your different life areas. These areas would include: financial, spiritual, family, recreational, employment, financial, physical and social. Divide a paper in half. List the way things are and the way you want things to be in each category. This will allow you not only to step back and ask what you are really looking for in these areas, but to work toward measurable and clear goals. The next step, is to come up with a plan of action to commit to improving each area you are not satisfied with.
When making this list, make sure that these are your goals and not someone else's. If you are being told by someone of influence in your life that you should be moving up the corporate ladder, you can find yourself as being unhappy getting a promotion. This promotion will be on what others expect not what you want. Furthermore, this pursuit of someone else's goal or expectation could impact on a different life area of your's that will make you less happy(less time at home with family),
If you cannot conceptualize what will make you happy, I would suggest talking to a neutral third party to help sort this out for you. There will clearly be challenges in this journey if you cannot picture a point of destination and a map to get there.