Want to be a good agent mainly needs to start from several aspects.
The first is to know your own wine. You need to know the country, origin, grade, tree age and soil type of the wine from the supplier. This is all to be mastered. Without these, your customers don't know as much about the products as you do. How can you sell them?
Secondly, you should know the knowledge of wine tasting, and have a certain ability to identify the wines you need to represent, so that you can better serve customers with your own ideas.
Third, you should make your customers feel that you are professional. Your major is not only wine, but also you should have a certain understanding of your marketing strategy, so as to support your customers and let them sell more of your wine. Only when they are ready can you become a good agent.