* Widely used products. The more people that use a product, the more likely a visitor to your lens will buy it. But to be successful a lens has to have somethng unique to offer. For example an attractive price or an interesting use for the product.
Amazon Best Sellers gives me ideas about what people shop for. This is where I got my idea to build lenses about Ugg Shoes and some Ugg look alikes. I noticed in Amazon best sellers that Uggs and similar products are amongst Amazon's best selling shoes, eventhough I had been reading that so many people seemed to hate them. It was a perfect product idea!