Your life today is the result of your personal choices and this life is not a rehearsal for something else. Your aim in life should be to understand and utilize effectively your full potential as a human being and become everything you are capable of becoming for which self-analysis is the first step.
Defining yourself as depicted by your Self-Image (at the moment)
Identifying you Self-Ideal
Determining the degree of your Self-Esteem
Identifying your values in life
Deciding the priorities of your values
Understanding your basic emotions (which decide your personality traits) and qualities
Identifying your strengths and weakness
Understanding your limitations
Digging out innate talents
Start the process with a fresh and positive mental state. Remind yourself that this is the essential step needed to chart out the action plan for your own development in life. Look at yourself as a balanced outsider and make the analysis. Never leave anything that comes to your mind about yourself, because, even a trivial matter matters.
At the end of the analysis you are now
Clear about your Self-Image, emotions, values, strengths and weaknesses, aspirations, limitations etc.
You know what you are, why you are so, what you want to be and how can you achieve what you want.
Well, now write your mission statement, set your goals and write your action plan with time frame.