One very common mistake that we all make is that we compare ourselves to others very often.
From The Hello, Fears Challenge, Day 32:
Today, your challenge is to CONTRAST. To do that, I want you to write down a list of people you always compare yourself to in all walks of life (as an employee/entrepreneur/student, as a daughter, as a friend, as a mom, as a spouse, etc.). Then, write one to two things that set you apart from those people, things you have and they don’t.