Others like links, and so on. Read the rules of each engine. I don't know what to sell on my Web Site. Many businesses that start a Web site already have product or service to sell. Shoes, food spices, books, toys etc.
Everyday experiences count, too.
Just make sure your report can not be found free on the Internet. Otherwise, it would have no value. This month I will only tell you about one web site that offers FREE Web Tools. This is not an advertisement. It is just that I was totally fascinated by the number and quality of free Web Tools they offer.