Figure out your idea-make sure its commercial ie that you have something a little unique to sell for money. Form a corporation or LLC. Get a domain name. Make your own website-thats your main marketing tool. Do research about what people are paying for websites. Figure out a way to sell your product. Its probably too late for SEO but maybe there are people in your neighborhood or area who can use a website. Give a good deal to the early customers. Give rebates and bounties to customers who refer new customers to you. Underpromise and over deliver.