If you look in the mirror and see a fat bast#rd then that is feedback. If you walk into the door and your wife and kids ignore you, that is feedback. If, every time you get up for work and feel awful about it then that is feedback.
I started a training and healthy eating regime last week and I have a special set of weighing scales which checks my body fat, weight, water content etc. After a weeks of training and eating well I dropped a very small amount of weight and body fat.
It was quite annoying actually because I felt that I had been eating and training well. The feedback told me otherwise though.
We need to pay attention to feedback and check it regularly to see if we are on track. Feedback for our exams is practice exams, speed of doing subnetting, speed and accuracy in labs and ability to answer forum questions.
It is also how many flash study cards we have left to read because we mark those we no longer need to read again.
Check your feedback, alter your plan and change course.