At the church that I went to there was a VERY elderly woman with an absolutely incredible singing voice. She knew I liked hearing her sing a particular hymn, and I'd sometimes as her if she'd sing it for me. With a wink and a grin she'd say "I'll sing a solo if you sing a solo for me first."
The first few times this didn't work, but eventually I did it. Then she asked me to help her get to the front so she'd take my arm and we'd walk, very slowly, up to the front of the church. I helped her up the stairs to the pulpit, got her a microphone, and she sang this hymn... and even though I'm no longer religious her singing this hymn is still the most beautiful thing I have ever heard. (And it's a beautiful hymn as it is, and she just KILLED it.)
I wish I had a recording of her,
we'll have to make due with Johnny Cash.
And years later I realized what she did- because of her making me sing a song for her first I can sing in front of a crowded gymnasium, a church congregation, I can speak in front of a college classroom, in front of a news camera (that's a hell of a story in and of itself) with out fear. I have no fear of public speaking. Zero. And it's all because of the kind old woman who made me sing for her before she'd sing for me.