Before we talk about how, let's talk about why. If you are saying "YES" to everything, you're basically distracting yourself from being committed to any one thing. While" Saying yes to everything, open new doors" does hold some truth, don't you think we already have too many doors open? Sometimes, we just need to say no other doors and go inside one!
Here's how you can get better at saying "no":
Here are also a few (how to say "NO" politely over text) liners:
Warren Buffett once said, "The difference between successful people and very successful people is that very successful people say NO to almost everything."