Here’s a funny one-
“Don’t think of yourself as an ugly person.
Think of yourself as a beautiful monkey!”
Now it isn’t just for looks or personality or attitude or your work. It could be anything. Never put yourself down. Agreed that some people are just born talented. But rather than undermining yourself( Well, leave that job to someone else!), consider yourself the best in your breed. They say beauty lies in the eyes of the beholder. The first step is to see yourself as beautiful and awesome- before expecting someone else to do that for you.