Learn how to direct your audience's attention to associated concepts that will make it more likely to for them to say yes to your future request. This easy concept and ways to deploy it to gain influence over people are explained here.
Persuading people is actually very easy. The problem is that all this time, we've been taught wrong. This will clear the fog and show you the right way to do it.
If your persuasion skills are not as good as you hoped they should be and you are not getting what you want in life, it is really not your fault and I understand your frustration. I was once in your position. You have been misled and mostly taught the wrong ways to persuade by the confusing advice out there.