(Most people won't get the reference, but here goes:)
I stare into a mirror and tell myself that "I'm good enough, I'm smart enough, and doggonnit, people like me."
(Very early 90's Saturday Night Live Stuart Smalley catchphrase)
OT:
I can't help you with that. My self confidence on a social level is shit for the last year or so. Luckily my professional self-confidence is not tied into to my social self-confidence.