A quote from COlin's Thread, And i am sure that you read it! but just putting it here to emphasise, We can learn a lot from him.
-Spend more time looking at the model than your own drawing.
-Remember your principles of composition, REVERB-CU, rhythm, emphasis, variety, ecology, repetition, balance, continuity and unity. (at least i think every gesture is like a mini composition by itself.)
-There is no correct procedure. Every time is different, sometimes i start with center lines, sometimes i start with big shapes, sometimes contour, sometimes mass tone. Go with what the pose tells you.
-It's OK to exagerate and/or simplify.
-Look at gestures from the masters for inspiration.
-Don't be afraid to fail big. (I owe that one to the great George Pratt!)