Review life up to this point:

Look at the peaks, the valleys, the joys, the sad times, the changes you wish you had made, the changes you still have the opportunity to make.
Appraise your own personality, your lifestyle.
Consider your likes and dislikes, where you are in the life cycle and how you want to live your life in the coming decades.
Take a new--and possibly different--look at your own spiritual life, relating this to how you want to approach life from here on out.
Most importantly, be comfortable in your thoughts, your decisions, your plans for the future.

This can be a daunting task. It can also be revealing. Not too many of us want to place ourselves figuratively on the analyst's couch and peel away the protective layers built up over the past decades. Many take the attitude of "I don't want to think about that," or "I'll think about that tomorrow." But, hey it can also be a bit of fun.