If you are reading this book, you are undoubtedly trying to become more productive by managing your time better. That's a great goal. But you can't really manage time. An hour will always consist of 60 minutes, and a day will have 24 hours. You can't change that. So, if you lament, "I never have enough time!" keep in mind that you have the same amount of time as everyone else.
You can't control time, but you can control yourself by making better choices every day. With every choice you make, you can either make your life better or make it harder. Setting goals correctly is an important part of time management. However, it is critical not to confuse the end goal (the end result) with the steps designed to get there.