Thank you for your responses. I like the analogy of learning to write. I have been learning this principle through the Shodan kata just recently. For example in Ude Osae Dori http://www.youtube.com/watch?v=gDwAPgzeSiM
when I first began training, I was taking uke's arm in a high semi circle over my head before taking them to the ground and pinning them. Now, as Hobbs Sensei demonstrates here I apply my bodyweight, while cutting through the wrist causing pain and uke's compliance before taking the arm over and pinning them. I am constantly learning this principle of posture and bodyweight to applying an effective technique, especially when it comes to spherical or circular motion.