It can be easy to have a cynical view of what people are asking for, but in my experience there is often real value you can uncover.
One thing which helped me a lot is having a decent understanding of accounting and finance. A fun, and fairly quick, way to develop that is by taking a course on financial modelling (in excel). Modelling a business in a spreadsheet is a lot of fun, and it helps you build good intuition on the underlying "physics" of how a business makes money.