Self-criticism is a mental habit. In order to replace self-criticism with self-compassion, we must practice mindfulness.
When you find yourself caught up in that negative noise and mind chatter, stop, take a deep breath, and refocus your thoughts on something more positive about yourself. What qualities do you like about yourself? What have you done recently that you feel proud about? It can be anything, “I am always on time,” or, “I made the cashier smile.”
When you do find yourself having negative thoughts, DO NOT chastise yourself for having them. Thank those negative thoughts and tell them you no longer need them, then send them on their way to make room for positivity.