If you’re wordpress user , there is a child theme designed for divi theme called Divi Schema Child Theme. This theme automatically adds microdata and generates Rich Snippets for you. it makes separation of your page: header, content, footer, sidebars , comments and more elements. That way, goggle can understand what is going on your page better and improve your search engine result visual look.
If you are more confident in your skills, you can also market directly to websites and blogs. You can contact the sites by email to market your services. That will also enable you to select the specific types of sites that you are more comfortable working with. Since there are literally thousands of websites and blogs on the web, the potential market is limitless.
If you need to mark more words, make them bold or use other heading tags from H2-H6. Repeating the same words many times, what is called keywords stuffing, will not help you much, it can even heart you if the SE think that the page is spam. No need to repeat words more than few times, Google and other SE are smart enough and will get the idea for what your page is about. Also don’t try to the other thing of limiting your words count, just be natural.