Again, while there are steps I took here that are not truly necessary, when I first started sculpting they were extremely useful in getting myself acquainted with various nuances of the human body in three dimensions. I might add that all of the above also augmented my draftsmanship greatly. There is nothing like truly knowing in your mind's eye exactly what you are drawing looks like in three dimensions. It makes rendering anything exponentially easier, particularly when needing to either substantially change inaccurate reference or work completely from imagination. There is nothing like the ability to turn something around in your mind's eye as you draw. I can't think of any better practice for developing this skill than sculpting.
Best,
Joe