I never had a problem with playing music in front of large crowds, being a self-centered bastard. But at times when I played shows in front of 10 people, or 2 label people; that's when I got self-conscious. The typical stage fright remedies I heard were to look slightly over the audiences heads, or (more commonly) drink varying amounts of Jaegermeister.
In Nodame Cantabile, unbearably cute Sakura and the S Orchestra get nervous before their first performance. Her mantra, at about :30, killed me. But it beats pretending the audience is naked.