Specific (clear and concise)
Credible (sincere and honest)
Emotional (friendly, passionate, empathetic)
Above all, discover the power of sincerity. It is awesome. First, it humanizes you. Secondly, it forces you to do a good job (good things in general). Thirdly, it makes you honest with yourself so you can thrive on true basis. And forthly, it reduces your tension and stress.