Here is a link that I have found helpful in planning our school year as well as unit studies:
I really like how this guides you from a general overview of where you want to go, down to the smaller steps of getting there. Now I refer to my "homeschool planner" and am able to figure out lesson plans with a clearer focus and direction. It has made my planning MUCH easier, and I can actually see our progress toward a larger goal. Thank you to Love to Learn for posting it!