The success of your product will great depend on how much you first invest in doing market research. You have not given any details of any product that you want to sell but will give just general guides. Research about the target market, any similar product in the market and any potential competition. this will help you in deciding on what method or platform you will use during product promotion. The product is new, and that means the potential buyers dont know anything about it. therefore you have to educate them about the product, the advantages and importance of having it. You have to package it in a form that it will be attractive and it will make them try it out. The first customers have to like it or else you will be destroyed in any future sales. Find efficient ways to penetrate the market by e.g giving bonuses and points to the first 100 buyers, selling it a cheap price or any method that you will find best. Make sure your product does not have any flaws for critics to use against you. I hope i helped you friend. All the best in your business.