If you can’t convert sales within the first week or two, don’t get sad about it. You’re in affiliate marketing for the long run. It takes time to build passive income.
Add a disclosure clause at the beginning of every blog post or page on your website that contains affiliate links.

However, if you have a favorite tool of your trade, a must-have gadget that will make your readers’ lives easier, or a high-quality recommendation that you’re sure people will be thrilled with, go ahead and offer it. Niche shopping — Product Review Mom (parenting), Compost Mania (gardening), Roemer’s Workshop (hobbies), Pinch of Yum (food) Tech or gadgets — Engadget, Gizmodo, Craziest Gadgets Cool stuff — This Is Why I’m Broke Advantages Once you have an established blog, companies may approach you and offer you free products in exchange for a review. (You should always disclose this, as it could be seen as a conflict of interest.) If you can afford to purchase products on your own in order to test them, you’ll be seen as a truly objective reviewer. Disadvantages Commissions from e-commerce stores are usually a lot lower because of the overhead, so you’ll have to sell a whole lot more products to make a decent income. Buying products so you can review them before promoting them can be expensive. Offer physical products only under certain circumstances: They’re directly related to your blog topic and something your audience absolutely needs. They’re not commodities. Specialized and distinctive products from e-commerce stores reflect better on you, boosting your reputation and credibility.
So, the first thing is of course a blog. I say a blog because having a blog unlocks a lot of opportunities to promote affiliate links and conveying your message becomes a lot easier. Because you will be using blogs to tell your readers about your experience.