When I was about 20 and a young classical pianist, I learned the core lesson of this great TED Talk by Amy Cuddy. I'd get up on stage and as I started to play, I'd feel none of the emotional connection to the music I knew I'd feel if I were practicing alone.
One day I decided to "fake it." And I discovered that by pretending to connect with the music helped my audience connect with the emotional intensity of the music and it helped me quickly locate it as well. Within seconds, I'd become the music.