First, say to yourself, 'I'm totally independent of the good or bad opinions of others.' Second: 'I'm beneath no one.' Third: 'I'm fearless in the face of any and all challenges.'
Most people talk about fear of the unknown, but if there is anything to fear, it is the known.
Learn to get in touch with the innermost essence of your being. This true essence is beyond the ego. It is fearless; it is free; it is immune to criticism; it does not fear any challenge. It is beneath no one, superior to no one, and full of magic, mystery, and enchantment.
You'll never get anywhere unless you're independent of the good and bad opinion of others. Be fearless.