You don’t.
You are in business to help people. Of course you need to make a living, and you’d like to make a good one, but if your business is only about money, you’re in the wrong business.
If you’re truly in business to help others, to make the world a better place, the more people you help the better. Your goal is to spread your message. Plant as many seeds as possible so you can reap the biggest harvest.
Not all seeds grow. You can’t know — can not know — which ones will grow. The math is simple: the more seeds you plant the more seeds grow and the more you reap.
… more … “How do I keep people from loaning my book so I don’t lose sales?”
Reading a public forum today, I ran across a lengthy comment by a member of the traditional publishing industry.