A wonderful penpal of mine asked me this question (which I have yet to answer):
How would I define happiness? What it means to me? Am I happy?
That is a prompt for your journal. Often we are so absorbed in mindless pursuits of daily life, rushing after success as it is defined by society, and we forget to stop and think if our definition of success is the same as the society's. Every day of your life that you are not working towards what ultimately makes you happy, is one more day that you are walking away from it.
There are hardly any absolute truths in life, and certainly no guarantees, so it is up to each one of us to make each day count. Our deepest and most important dreams may not be possible to achieve in a day, a month, a year or even ten years, but it is possible to be always working towards them.
If we can define - fluidly, not concretly - what happiness means to us, what it is that gives us a filling of fulfillment than we are far closer to it than billions of people who never stop to ponder the question, and to take time to glance within their own souls.
So pick up your pens or your keyboards and get writing...