Both dropshippers and affiliate marketers excel at generating traffic and marketing. You can still make money with affiliate marketing. If you’re great at affiliate marketing, there’s no need to stop doing it. It’s about taking your efforts to the next level. The most profitable way to grow as an affiliate marketer is to add a store to your website.
I personally prefer to do it that way--you can create a more convincing review that's more likely to make sales. It's not always possible or practical, though; for example, would you break up with your significant other just to test a product for getting your ex back? ;-) In cases like that, or if the product is expensive, it's usually best just to use the vendor's affiliate resources instead.
Watch them. How are other content creators in your niche utilizing advertising? What types of ads do they use? What are they promoting? What do they talk about repeatedly (if you keep seeing the same affiliate product show up again and again, there’s a good chance they’re making good money from it)? If you see a product or service they talk about that jogs your memory and you can ethically promote it too, find affiliate information by the methods described above.