There's no way I'm putting it down in a comment, unfortunately - if I do go through the effort of writing down my moral system in a linear form that is understandable to other people, it'll be a several-pages-long essay (possibly a LW post, though). Step zero, for what it's worth, starts with asking "why do I want X?", and recursing that question until you hit an answer you can neither question (without questioning reality itself) nor alter.