You need to have a basic understanding on what constitutes a good business slogan, be presentable, make your product more appealing than other people in the same niche, see what they do to make their product or service more desirable, learn from successful competitors and make sure you have an appeal that is original that will make your service or product different from the rest. First strive to be competent and reliable, don't focus on getting sales fast right away. Over time you'll build a reliable customer base and a certain feel and from that point improve as best as you can