To draw figures well, one should follow certain steps. The first is the gesture. The second is the bean.
In short, the bean is :
We have two forms, one for the rib cage and another for the hips. You can even just imagine a sock with two balls in it.. Whatever analogy you want to use. Basically we have two hard forms with a softer “skin” around them.There's a lot more explanation and a video on Proko's site.
I purchased Proko's premium content of the figure drawing lessons. It's worth the price. You get extended, high-definition videos, reference poses and other helpful items. There's no way you won't learn something from this guy!