Answer:
write them down
Explanation:
First the writing down of important events in your life gives you the change to analyse them if necessary, use them for looking back when you´re older (and supposedly wiser) to discover certain things about yourself, and keep a reliable record of your actions that in any other case get lost in the mist of our memory. As Eric Hobsbawm once stated: ¨The incredible shortness of memory.¨