That is a bit like asking me for the secret of successful marriage or how to build a multi-million dollar business. In the final analysis, while there are many useful home-schooling resources and taking advantage of the hard work done by others is a no-brainer, as human beings each of us has to independently sift through available material or chart our own path.
Each parent and each child is an individual. What appeals to and is effective for one person will repel or bore another person to tears. The same material introduced at a different stage of life may well get an entirely different result. I remember when Stephen Crane’s The Red Badge of Courage was assigned as mandatory reading for one of my college courses. I found it the most boring book imaginable. Years later, the Sonlight (o.k., I guess I did mention one resource. I will speak more about it at another time.) curriculum I was using with my twelve-year-old daughter included that very book, which elicited an unarticulated groan from me.