Like any branding - its about marketing and the ability to be memorable. Its unfortunate that most of us are terrible at making impressions. The good news is that there is a simple recipe which you can use to improve. I simply cant recommend the book Made To Stick by Chip and Dan Heath enough. You gotta read the whole book to get the whole picture - or at least start reading their columns in Fast Company. These two brothers provide some simple guidelines that can be remembered by the acronym SUCCES(S).

Simple - Keep your message short, tight and to the point
Unexpected - Say something unusual but poignant to keep attention
Concrete - Give me some vivid details to make it real
Credible - Give me some facts and statistics
Emotional - Tell me whats in it for me
Stories - Stories help people understand and move them to action