You will need to tie your strategy in with your own personal values so that you don’t lose interest over time. If you decided to start a digital marketing agency, you might figure out from the start where you draw the line at customers. For example, do you want to tie your name to an oil company, or offer a service that you may not be brilliant at, but that will attract a lot of customers?
It's now possible to reach people (customers, clients, subscribers, etc.) based on shared ideals and values. Microbusinesses of one sort or another have been around since the beginning of commerce, but the ease of connecting with people is a new phenomenon. Also, a large percentage of the population is being comfortable with making purchases online. These things create a perfect storm of economic convergence. It's never been easier.