One of underestimated tasks in nonfiction writing is to impose narrative shape on an unwieldy mass of material.
William ZinsserA writer is obviously at his most natural and relaxed when he writes in the first person. Writing is a personal transaction between two people, conducted on paper, and the transaction will go well to the extent that it retains its humanity.
William ZinsserWrite about small, self-contained incidents that are still vivid in your memory. If you remember them, it's because they contain a larger truth that your readers will recognize in their own lives. Think small and you'll wind up finding the big themes in your family saga.
William Zinsser