I don't really have much of a plan when I do it. I sew the "flowers" together then will layout chunks and just pick random edges to sew together. it means that i have to end up creasing/bending some of the papers in the outer petals as they come together, but it doesn't really matter in the long run. maybe some of the above videos have a better strategy, but I just go for it and it works. (I am self taught so I often dont have much strategy anyway!)