How Do You Find Keywords in Your Content Process?

I have used scraping programs where you can get thousands and thousands of blender words or microwave, you know, phrases. And it's so hard to decide which one to choose that you end up going back to looking at search volumes. So I pretty well would choose between three and five products that are all like four, four star and above rated. It's got to be in terms that the reader can understand what they want from their product. Do they want it to save them time? Or is there a better way for them to buy it? What does your content process work? Well, they're pretty well self contained. They're kind of weaving into each other as far as the keyword density