First of all, you need to know your product and the company to the core. Because if you will know your product very well then, whenever you talk to your prospects you will seem as well knowledgeable person, and people will see that. It will come very naturally our from you.
Second, believe in your product, company. You see... when we marketer we literally transmit our won feeling to people we are interacting, and so, if you believe your product and have a passionate feeling about it, people you work with will feel it and get that feeling from you.
Third, if you are successful and have many people in your team build a team website -or whatever place- for your team to hang out, connect and learn from each other.
To your success !