I orginally got this from Jude Ledesma from Berkeley. However, I think it was in a Gracie book; though not sure which one.
I like it because it helps give a beginner a structure to work by ... an understanding of what positions are strategically considered more important than others. I find that it has helped clarify / guide my game. It is a great guide.
Read from top to bottom. It goes from best positions to worst positions in BJJ:
Back with hooks / opponent belly down with you on his back
Back with hooks / you on your back with opponent on you
Mount
