William Zissner, a giant in the nonfiction writing world and the author of On Writing Well, gives us the most simple advice. From an essay of his in 2006, on the American Scholar website.
As for how to actually organize your memoir, my final advice is, again, think small. Tackle your life in easily manageable chunks. Don’t visualize the finished product, the grand edifice you have vowed to construct. That will only make you anxious.
Here’s what I suggest.
Go to your desk on Monday morning and write about some event that’s still vivid in your memory. What you write doesn’t have to be long—three pages, five pages—but it should have a beginning and an end. Put that episode in a folder and get on with your life. On Tuesday morning, do the same thing. Tuesday’s episode doesn’t have to be related to Monday’s episode. Take whatever memory comes calling; your subconscious mind, having been put to work, will start delivering your past.
Keep this up for two months, or three months, or six months. Don’t be impatient to start writing your “memoir,” the one you had in mind before you began. Then, one day, take all your entries out of their folder and spread them on the floor. (The floor is often a writer’s best friend.) Read them through and see what they tell you and what patterns emerge. They will tell you what your memoir is about and what it’s not about. They will tell you what’s primary and what’s secondary, what’s interesting and what’s not, what’s emotional, what’s important, what’s funny, what’s unusual, what’s worth pursing and expanding. You’ll begin to glimpse your story’s narrative shape and the road you want to take.
Then all you have to do is put the pieces together.
Of course, the “putting together” the late, great Zissner describes can be one of the most creative aspects of this project. But until you have pieces, you can only imagine what your memoir will say, or hear the voice that will be telling the tale. You must be patient and write awhile, to begin.