Few things will improve your persuasion results more than creating a favourable first impression and surprisingly most of this is covert persuasion.
“A positive first impression starts the relationship on the right foot, while a poor one is often impossible to overcome.”
Whilst I believe that most of a positive first impression is created by building rapport with a prospect. And rapport building in mostly an unconscious practice. Following some of the guidelines in the following article will certainly help you create a good starting point.