Schedule a social event, such as a wine tasting, for existing or potential clients, and
use this as an opportunity to find out more about what they want.
Compare your marketing approach with that of your competitors. What areas are they targeting that you aren't?
Read trade journals to learn about new trends. This will help you stay ahead of the competition.
Study your sales records to see what fact you already have about have about the people who buy from you.
Spend time in a shop or at a trade fair listening to people. What do they talk about? what questions do they ask?