I grit my teeth, and I sing my note. And since I can't remember lyrics to save myself, I sing a new song every time the baby goes to sleep. And for some odd reason it always comes out sounding like Yellow Submarine:
"Go to sleeeeeeep / little girrrrrrrrl. // Go to sleee-eee-eeep, / sweeetie piiiiiiieee. // Sleepy sleeeeeep, / little sleeeeeeep, / sleepy giiii-ii-iirl, / beddy bye."
Did it work? Judge thusly: