The ultimate form of confidence is to boost other people's confidence. When you become a source of confidence or trigger confidence and good vibes in others you'll appear higher value and in turn, you'll vibrate a more confident aura.

Taking the be yourself to the core advice, at my core I like to be the dirt that nurtures the confidence in other people, I enjoy making other's feel better or legitimately helping others. And if you're genuine with yourself then you'll feel the utmost confidence real.

Sincere compliments, not always, not often but only when you feel it. Don't be the pushover, just be casual about it. Like if you really like a sweater or a bold design or some shit. SAY SOMETHING. You'll make their day and occupy a good highlight of there day. Also compliment DUDE, yup! Compliment dudes, it ain't gay heck you might even make a friend.

Or you know you could occupy their insecure area of an insecure girl further pushing them down so a lowly low life that you may be can pick them off?