What are different ways to say no?
Honestly, there is only one way to say no, by saying no. There is no better way to communicate this.
How do I learn to say no?
The best way to learn to say no is to practice it in the mirror. You can say it for smaller things that don’t matter as much as well so that you get used to saying the word better.
How do you say no in a nice way?
Say no politely by having appropriate tone and body language. Keep in touch with the person that you have said no to so that they understand that you had a valid reason to say no for.