Without seeing your blog it is not easy to say but why not go through a few of your recent posts and look for ways of including an affiliate link?
That will show you how to do it in forthcoming posts.
If you are happy with the progress of your blog then why change it? Just use good products as offers to email subscribers and readers.
Remember people may find your blog on any of your posts - they are not all going to find your latest post when they click through from the search engine, so going through all your past posts and putting appropriate links there is important.
Badly phrased, I hope you get it!!
:-)
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