Saying 'no' is difficult for many people which makes it hard to control your own life. Too many people will take advantage of you if you always say 'yes' to every request no matter whether it relates to your work or interferes with you plans.
Once you learn to say 'no' and people around you expect to hear you say 'no' your life will improve and you will discover your self-worth improves as well as you are able to take back control of your life.
This book:
The Power Of No – Learn How To Say No And Take Back Your Life
can help you to better understand why you should learn to say 'no' to the requests for your time and energy and will also show you how to use this powerful word.