How can you promote products daily via blogs?

To introduce myself, I have a few adsense sites making me money and I want to move to affiliate marketing.
I’m really digging the style of blogs and the ease of not having to code for a ton of sites, as I would like to have a large network soon. But it seems like the natural style of blogs is to post something new each day or every few days… How can I promote lets say for example a guide to train your dog, but post about it every day? It seems like I would make a paragraph to pitch the product and then it would be done. What would I write about after that? Start a new related product maybe?
And I’ve heard of people having something like a "tech blog" with a bunch of reviews for different products, but if I have a computer on one post and […]

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