It's what good hypnotists use to install their suggestions in your mind. The same thing can happen in your writing. Consciously choose to repeat your main points. Don't be afraid to re-say something. The more you repeat your basic offer or basic reasons to buy, the more you will influence your reader's unconscious mind.
Repetition is hypnotic.
Repetition is hypnotic. Repetition is hypnotic. Just ask Robin Williams. Or my girlfriend. Do your friend a favor and tell them about this article.