It depends what you want to do, but selling one piece of software (or a cloud service etc) online or via app stores etc is monumentally more efficient than doin

It depends what you want to do, but selling one piece of software (or a cloud service etc) online or via app stores etc is monumentally more efficient than doing lots of different software development for clients. The trick with selling one app is finding a solid niche you can successfully build and productize an app/service for.