Possibly more than anything else, Fishkin is a proponent of creating high-quality, useful, honest content. He’ll never recommend keyword stuffing, link buying, or any other tactics that—while legal—are generally frowned upon. If you’re not familiar with his idea of 10x quality content, you should click that link and get to know it well. It’s a guiding principle in high-quality content marketing
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ads will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.
Your small business must pay state income tax in the state you operate in. Depending on how your business is organized, you could pay corporate tax or a limited liability company tax in addition to your personal income tax. You may pay taxes in the state the selling company is located in if that state taxes entities who earn money within their borders (even if the earner is located out of state). Your affiliate marketing company is considered a separate entity from the selling company when it comes to figuring state income taxes.