Every successful business (1) creates or provides something of value that (2) other people want or need (3) at a price they're willing to pay, in a way that (4) satisfies the purchaser's needs and expectations and (5) provides the business sufficient revenue to make it worthwhile for the owners to continue operation.

As much as I enjoyed yoga courses, it was hard to make time for them. Generally speaking, my work arrangements were flexible, so it was mostly a psychological problem: it was hard to convince myself it was acceptable to go twist my body into knots for two hours when there was work to be done.