"The one thing that changes everything". TRUST!
Should you have some extra time on your hands these days then I suggest you read The Speed of Trust by Stephen M. R. Covey. In connection with my publishing The 3 Energies Behind Sales Success come October this year, Covey's book on trust is a great supplementary read to learn more about how to influence others.
What's it about? High speed and low cost. Trust me ;-)