I would ask the guys at Cool Tools (first result on google) for their ideas. They post cool or unique tools and reviews from users, often with an affiliate lin

I would ask the guys at Cool Tools (first result on google) for their ideas. They post cool or unique tools and reviews from users, often with an affiliate link at the bottom (to Amazon for example). Don't force it, but if you find yourself mentioning a product, affiliate link to it. For example, your post about purple carrots had a link to seeds. Use a referral to get a percentage of the sales from people visiting that link.