Extrinsic motivation is an external form of motivation. For example, if your boss sets a deadline on a project and your bonus is tied to the deadline, that is a very clear form of extrinsic motivation. In fact, this example includes two extrinsic motivators: your boss's expectations and the bonus. So, extrinsic motivation doesn't always have to be another person, but it is some outside demand, obligation, or reward that requires the achievement of a particular goal.

Be specific with positive feedback that you give yourself. Many people who need extrinsic motivation tend to be very negative in providing themselves with feedback. A good way to observe this is to keep a notebook for a week, or even a day, in which you record self-statements about the goal you are trying to achieve. 

Amazing @chbartist ....