He who would do good to another must do it in Minute Particulars: general Good is the plea of the scoundrel hypocrite and flatterer for Art and Science cannot exist but in minutely organized Particulars.
There are two ways to extend a business. Take inventory of what you're good at and extend out from your skills. Or determine what your customers need and work backward even if it requires learning new skills. Kindle is an example of working backward.