Feedback is an essential part of many activities. For instance, when driving a car you rely on visual feedback from the road ahead to ensure that you are driving in the correct direction, that you are maintaining a safe speed and so forth.
Likewise you rely on feedback when communicating with other people. Subtle changes of facial expressions and body language indicate when you might want to change your approach.
Building feedback into your life is relatively straightforward and there are many ways you can do this.
You could ask for feedback from other people, you could look at stats from your website, or gauge the reaction of people using surveys.
I would suggest that the best form of feedback is from individuals, preferably from those who care enough to give it. Someone who seeks you out is likely to either point out the flaws in your work, or point out what you are doing well.
You can use the former to improve, and the latter to confirm what is going well.
