Remember all of the main tips and essentials of writing a formal paper that you learned (or were supposed to learn) in high school and college? Every good writer knows that you can't write a good paper if you don't have a thesis~a topic, a subject, a main idea. If your main idea isn't clear, you've lost the reader and pretty much, your paper will suck. However, if you have a good thesis and a captivating subject, you will gain the reader's interest, and hopefully their respect.
I feel like my life is a formal paper and I have no idea what my thesis is. I have no subject; therefore, my "paper" sucks. I'm writing the story of my life and I have.... writer's block.