Saying No is one of the most difficult words for some people to say.
Being able to say NO is also essential to be able to make good decisions.
There are a few tricks for saying NO tactfully with sensitivity, and conviction
1. Say It Like You Mean It.
2. State the facts. Explain the reasons why you cannot and will not do something.
3. Repeat your NO as many times as necessary.
4. Do not imply there may be a chance later on for you to do what is being asked.
Stick to it. There is no need to feel guilty for saying no.