At life, the dynamics life, we need to have a tough principe, we must sure about what values we have, what our purpose. Clearly say what we want and what we want people to do for us. Never afraid say what we want, never afraid want something, showing what we want because believe me, sometimes its works, people don't mind about what you want but they never care too much. So yes, never afraid to say no. Even its not the mainstream idea, but its cool when you really sure about what you want. Clearly.