You must be aware of one thing: Your internal dialogue can directly affect your health, both physical and psychological. That limiting self-talk impairs your self-esteem and shuts down your potential, resources, and opportunities. Thus, you must change its docus. 

A simple way to achieve this is by addressing yourself in the second person instead of in the first person. This is a way to assume the role of a friend, who wishes the best for your and is attentive to correct your internal dialogue.

A study of the Yale School of Medicin, revealed how persistend negative internal dialogue weakened multiple neural structures. 

Structures such as the insula and the amygdala showed high hyperactivity. These areas related to emotions such as fear or attention to threats in your environment ...