“To effectively apply the instructions in this book, it is vital to break free from old habits and adopt new ones. The way to do that is with practice drills, which involve repeating a routine over and over, not in conjunction with any other activity, until the body develops a rhythm and habit for it. Drills are essential to skill development. High performers in many disciplines become high performers by regularly practicing their craft with drills. They are key to learning, retaining, and most importantly, easing into something new. For this reason, the chapters in this book end with practice drills that help you integrate and become accustomed to the instructions. I strongly recommend doing them before moving to the next chapter.”