Finding a voice that your readers will enjoy is largely a matter of taste. Saying that isn't much help-taste is a quality so intangible that it can't even be defined. But we know it when we meet it.
William ZinsserWriting is linear and sequential; Sentence B must follow Sentence A, and Sentence C must follow Sentence B, and eventually you get to Sentence Z. The hard part of writing isn't the writing; it's the thinking. You can solve most of your writing problems if you stop after every sentence and ask: What does the reader need to know next?
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