"Keep a diary with you, and one day it will keep you."
Someone has said it. Apart from this maintaining a personal diary is a fun and fear mixed experience. I have a personal diary and write almost regularly. It is such a friend I can share every truth and situation I go through. Later it is quite interesting to read it as it reminds the situation you were in. But you should keep it secret as you share your personal feelings , emotions and situations which you never want to share with any other till you die.
Start writing a diary and you can discover the fun and fear yourself.