I completely agree with Perna! For me this works the best. No matter how many people, including therapist say you're worthy if it doesn't come from you it is not effective.

For me it really helped when I started seeing small things as achievements. Smiling and greeting people is a great starter cause it makes for a positive attitude in general. I really appreciate positivity as well, since it takes a lot of bravery and strength to have it these days.