If you've got to persuade somebody to do something, you aren't alone. When you think of it, pretty much every kind of conversation is based on some desire to persuade at some level. Even if you are reporting some dry information, your subconscious goal is to get approval and recognition for sharing that information.
With this in mind, it's clear that having an intention before you communicate is essential. Unfortunately, most people don't have much of an intention. At least not consciously. That means if you construct a solid intention before speaking, you'll be miles ahead of most people.
Another thing to keep in mind is the power of conversational hypnosis. This isn't as crazy or out there as you may think. Basically the idea is to use specific language patterns that can slip your ideas into somebody else's head without any conscious resistance. This is useful in many cases, not limited to sales, seduction, and getting a raise out of that stingy boss of yours.
So how do you do this? It would be wise to study the Milton Model set of language patterns. These were reverse engineered after Milton Erickson, one of the greatest conversational hypnotists whomever lived. Actually, he was one of the greatest therapists whoever lived as well.
How did he do it? He did careful research where he constructed careful language patterns which would leverage the internal criteria that everybody has inside of them. Then he would rearrange their criteria so that they would be much more effective in their lives.
One of his beliefs about people was that everybody has the solution to their problems inside of them. They only need to identify these resources and apply them in ways they haven't thought of yet. A typical counseling session would go something like this.
A person would come in with a problem. Erickson would ask them how they'd like to feel. Then he would tell them a seemingly unrelated story. In the story he would weave metaphors that would rearrange the patient's resources in more useful ways. The patient would leave with their problem completely solved. They would have little recollection of the particular story they were told.
Erickson quickly became legendary, and his communication model was reverse engineered into what is how called the Milton Model. This is the most powerful collection of conversational hypnosis patterns every collected. If you want to supercharge your communication skills, this is what you should learn. It will give you conversational and persuasive power beyond your wildest imagination.