Become an Amazon Associate and then use Keyword planner to find an in-demand niche: With more than a million different products to choose from and up to 10% commission the sales you drive, Amazon’s affiliate program is a great place to get started. Browse their available products and see what connects with you. Or take it a step further and use Google’s Keyword Planner to quickly check how many people are searching for a specific term. With affiliate marketing, the more relevant traffic you can pull in, the more you’ll make off your site.
Amazon offers a service called Fulfillment by Amazon (FBA), which can be extremely useful for arbitrage sellers, or others selling their own products. If you opt for FBA, Amazon will store, pick, pack and deliver your products. That means you can scale your arbitrage business quickly as you don’t have to store products in your own home or waste time with postage.
Etsy: While Etsy's popularity has declined recently, it's still a great resource for selling handmade items online. No need for complex ecommerce sites or merchant accounts or any sort of automation. The company takes a commission of every sale and charges a small listing fee per item. But many still use Etsy as their primary source of income. The best part is that you can also sell digital products on here such as poster designs.
Writing blog posts is especially effective for providing different opportunities to land on page one of search engines -- for instance, maybe your eyeglass store’s website is on page three of Google for “eyeglasses,” but your “Best Sunglasses of 2018” blog post is on page one, pulling in an impressive amount of traffic (over time, that blog post could also boost your overall website to page one).