What Affiliate would be a good choice?

Hey everyone!
Ok, so pretty much working on a zero budget right now and have learned a lot about SEO and marketing in general now its time to lay it all down to see how it goes.
I plan on the bum marketing method, however I think it would be a wise idea to use my own website to use articles and free blogs to link back to my website.
I wanted to know though, would it be a good idea to use several different affiliate programs related around a specific niche? I feel clickbank has a lot of products that are questionable and need some research to understand how good they really are.
While CJ has products which seem more reliable. Would it be a good idea just to stick with one or the other?
And also, when doing keyword research would I want to still target a main keyword […]

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