A great trick that I learned having worked as a screenwriter for many years, the way screenwriters work, is they break the project down into three-act structure: Act 1, Act 2, Act 3. I think that is a great way to break down any project, whether it's a new business or anything at all.
Steven PressfieldWhen a warrior fights not for himself, but for his brothers, when his most passionately sought goal is neither glory nor his own life's preservation, but to spend his substance for them, his comrades, not to abandon them, not to prove unworthy of them, then his heart truly has achieved contempt for death, and with that he transcends himself and his actions touch the sublime. That is why the true warrior cannot speak of battle save to his brothers who have been there with him. The truth is too holy, too sacred, for words." -Suicide (Gates of Fire)
Steven Pressfield