Email marketing: This is best in small doses. You don't want any partners sending out bulk emails to customers who aren't interested in your products or services, but with proper consideration for who's receiving the email, this could be an effective method. For instance, if you sell design tools, you might reach out to marketing agencies and ask, if they're working with a specific client on a design project, whether they might consider sending a URL from your site within the body of the email. This could help their clients leverage your tools to create higher-quality content, while giving agencies an added source of income.
Sometimes, affiliates have to go through an affiliate network to even be able to promote the product. For example, this happens if the merchant only manages their affiliate program on that network.

I like the number, because it’s feasible for new bloggers, even though it may seem daunting. It’s also enough to start making money, even though it’s small potatoes in the grand scheme of the Internet.
Even things as simple as adding an affiliate disclosure to avoid legal issues is important.