If what you are selling has a long run effect on your customer (exercising, financial security, passive income, etc.), it can help if you connect them to their future selves.
In your communication, show them or send them their picture (you can ask it from them for a surprise you’ll be sending them) age processed, software can create their image an X number of years from now. Of course, your message should be congruent with this idea, and help them realize that their future self is the same person they are now, and why it is important that they invest in their future (by paying you.)
If you publish articles and posts on your own, you want to enhance them with an image, a photo or an icon. It’s tedious and time-consuming to search for the right image with the right license.
Have a search engine that takes text or a URL of a web page, and based on that text find you the right images with the right license (probably some version of Creative Commons.)