Easy steps of how to say no:
1. Ask yourself either you want to do that. If the answer is no, find some way to say no politely.
2. Give some reasons of rejection and affirm our decision.
3. Let go of any guilt or resentment and be free from other people's thinking
4. Practice saying no to yourself before actually say it. Be truthful with your own feelings.
5. If you don't dare saying no at that time, just say that 'I will think about it' to delay the answer