Becoming your own cheerleader starts with being aware of when your inner critic [insert name here] shows up. Anytime they speak use the 'noted' or 'anyway' technique to consciously move past the thought. Remind yourself that if [insert name here] was actually real you sure as hell wouldn't be friends so there's no way you're going to be in your head either.
Lizzie Valesquez showed us that becoming your own cheerleader requires courage and practice. So put in the effort to become a champion.
TIP: Start your day and get into a positive frame of mind by reading your character strengths cards literally before you do anything else.