Split Analyzer is also another great product to test out different parts of your website, but you can't beat that Google Website Optimizer is free. I intend on giving that one a try in the future when I have time to learn it.

I also like using Google AdWords to help me pick a niche that has great potential. I put up several possible topics into different ad groups and pointed them to a survey pages customized for each niche - offering a free copy of the product in return for completing the survey. I asked what their biggest question was on the niche and how hard it was for them to find the answers to their questions. The niche with the largest conversion rate (most survey's completed) at the lowest cost, with the highest traffic rating and the highest number of people saying it was "extremely difficult" to find answers to their questions becomes your market. Then you simply answer the questions to create the product. Sending survey respondents a free copy allows you to get testimonials for your sales copy. And then you already have a Google AdWords campaign that you know drives traffic to test your sales letter before launching your product with JV partners. AdWords can help bring some great results. I learned this method from Glenn Livingston and have found it to work extremely well.