Options 8 and 9 are mine. Option 9 (could honestly be called a no-work compost pile) sits behind my vegetable garden and it began because I just started mindlessly tossing stuff there in the spring and forgot about it. When you lift up all those weeds and grasses you find worms and critters hard at work making compost and humus.
(I'm doing this for a friend who wants some advice on how to start a compost pile.)
Option 7 (container plus turning tool):