I have worked through the online orchestration lessons. I also have a hard copy of the Rimsky-Korsakov book. I review it on a regular basis. I am just wondering if any one can offer any tips on organizing any memorizing the "rules" laid out in the book. I see how they are organized by the author and it does make sense. But sometimes when I actually set about to the task of doing a GPO 4 orchestration I become aware that I may not remember all of the combinations that are described in the book. Any suggestions are welcome. Thanks.