If you are ever going to create the margin you need to focus on the things that matter most, you have to learn to say no. This is difficult, especially for recovering people pleasers like me. Fortunately, Dr. Ury make it easier by reframing the whole exercise as something positive—both for you and for the person making the request. If you struggle with saying no, this book will provide the motivation you need to say no more often.
The Power of a Positive No (New York, NY: Bantam, 2007)