How Do You Convince People of Things?

I told you so is weird and triumphant sounding because say you warned them of some horrible disaster in your company that was looming. It's kind of, you could kind of boil it down to how do you convince people of things, right? I think pictures help. They say a picture is worth a thousand words. And sometimes when you're trying to explain, like, if you do this, it will have this outcome, you can break it down for people by having a very simple graphic.