This would depend on the product you are selling and the industry you are in. Most consumer products, packaged goods and fashion industries have annual or more frequent trade shows throughout the world. Research your consumer market or the final audience you want your products to reach, then find a trade event and sell to retailers who attend these shows. Having a booth and good presence at these shows also builds your brand. In between events, reach out directly to retailers you want to see your products at. Offer them to sell products on consignments or give them samples to test out demand. The retailer is mostly interested in turning sales as quickly as possible with minimal space requirement, use this knowledge to sell your product. Please let me know if I can be of any further assistance.