Following this writer's advice I'm going to do exactly this (& if you do also, will you send me what you write?):
Write down what you value; what standards you hold for yourself and for others. Write about your dreams for the future and your hopes for your children. Write about the struggle of your ancestors and how the hardship they overcame shaped the person you are today. Write your biography, write down your memories. Because if you do not do it now, you may forget. Write a list of things you would never do. Because it is possible that in the next year, you will do them. Write a list of things you would never believe. Because it is possible that in the next year, you will either believe them or be forced to say you believe them.