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Since you are just starting out, start small and local. Approach local wine shops in your area to see if that is something they would be willing to carry. You'll be able to get a good sense of what the market is like and current competition for shelf space for your product, and how your pricing compares to what's already out there. Once you are in a few different stores, and have gotten some systems in place in terms of selling, shipping and record keeping, you can expand your market. You can do this yourself, hire salespeople or work with a distributor. In my experience, distributors are more willing to work with you if they see you're already in stores and that there is a demand for your product. Another thing to consider is, will you be able to meet production demands if for instance you signed on with a corporate deal which would require x amount of units per order? Growing is great, but growing too fast can lead to other problems.

If you want to learn how to sell is, to sell. Get into it. I have listed a few which I practiced while I was in sales. Here are some points from which you learn the selling of products to distribution stores.
1. has a very good knowledge of the product you are selling
2. good sales plan
3. good knowledge of the market
4. being aware of all the competitor’s activities
5. sufficient stock availability
7. ability to spot opportunities,
8. expanding the network while not hesitating to remove nonperformers
9. above all, being honest about your commitments to the dealers will earn you a long term edge over the competitors
10. following up
11. very good after-sales service
12. building own reputation.
When these are followed, rejection becomes minimal and your own personal brand is created in the market.