When you are at a restaurant, ask for your water with no ice and one or two slices of lemon. Lemon is good for loosening flem.
Drink lemon tea.
The night before an audition or performance, don't eat anything after 8 and get plenty of sleep.
Two words: Thayer's Lozenges :)
Singer's Saving Grace throat spray Professional Strength is so awesome. Unlike any other spray; even better than Vocal-Eze. Tastes extremely bitter, but after a few uses, you get used to it.
No dairy or citrus fruit on performance/audition days.
Begin each morning with light exercise to strengthen your stomach muscles and get the blood flowing (Yoga exercises are awesome for this). Also, sing a little, even on days you're not performing. Go up and down the scale ... know why Steven Tyler is better than ever at almost 60? He damages his throat nearly every night on a tour, but by taking great care of his voice and being extremely strict about vocal health, and by having perfect singing technique (Which he lacked in the early days of Aerosmith), you would never know it.
And take in deep breaths, but as you go up, use less breath by "closing off" parts of the throat. But that deep breath you took will allow you to stay in that same voice and prevent you from going into falsetto. This process is called "zipping up."
All I can think of :)
SAVE THE PALO ALTO BOWL!
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"And in the end, the love you take is equal to the love you make"
-- The Beatles
"Be the change you want to see in the world"
-- Mahatma Gandhi
"Celebrate Earth Day, every day"
-- John Denver
"Don't let them mold your mind, they want to control mankind, seems like their only intention is to exploit the earth; and you trust in their deceit, your mind causes your defeat, and so you become an invention to distort this earth; propoganda and lies, is a plague in our lives, how much more victimized, before we realize (hey) ... they'll make it attractive, to get man destracted, corrupting your (soul), polluting your (soul), destroying (your soul, mind control) ... ooh grand master, let the people go, you put them in total confusion, to downs-troy their soul; for they practise what you preach, so they're always in your reach, hi-tech slavery in these days, its mind control"
-- Stephen Marley