There no best ways. Every way depends on you. Every way is both best and worst. But here are some recommended ways to do affiliate marketing.

1. Blogging – I belive it is the most effective way for affiliate marketing. Publishing Low competitive content and SEO for organic traffic is the most effective way to get organic sales.

2. YouTube – You have to find your audience and create videos for them around your product and have to provide link in description so they can purchase it.

3. Pinterest – Pinterest is also a great way for affiliate, if you use it wisely. You can do organic affiliate with the help of pinterest.

4. Instagram – It is popular among youngsters who can purchase your product. You have to create page around your product and publish content on it. So it can get some organic reach.

You can also try running ads.

5. Facebook – It is mostly known for its effective and cheap ads. You can try running ads for your product on it. It will definitely gives you some sale.

Always remember that in affiliate marketing, you should not sell, you should provide value to your audience with your content. After getting value from you, your audience will automatically convert into sales.