I run an LSAT prep business. It's set up to be largely automated, four hour workweek style. I have a bunch of free written explanations people can use, and a paid video course.
I am not a programmer, but I learned for a few months. It was useful in allowing me to competently instruct a programmer for wordpress scripting needs. I would like to eventually learn. In the meantime, Hacker News has given me an incredible amount of overall business and marketing knowledge.