If you want to convince people with minimal efforts, then read through "Effective Communication Skills" and up Your game at Personal and professional life alike.
Most of our problems originate from wrongly perceived words and miss-interprete.
Have you ever worried about being wrongly judged and it stopped you from voicing Your opinion in front of others? If yes, then there is definitely something with Your selection of words and the way you deliver them to the OP.
If you want to convince people with minimal efforts, then read through "Effective Communication Skills" and up Your game at Personal and professional life alike