While scouring some voice-over forums, I came upon an unusual suggestion. A fellow voice actor had eaten some potato chips before a recording session because he was hungry and had nothing else to eat. He was amazed how good his voice felt and sounded. As it turns out, this "secret" is used by musicians and opera singers all the time.
I decided to give it a try and - amazingly - it really works. The oils from the chips coat your vocal chords and the salt helps to remove excess moisture from your mouth. The result is a beautiful read! I now keep a bag of potato chips in my recording studio and eat a few whenever I need to soothe my throat.
The best part is I get to eat potato chips as a requirement for my job - how cool is that!
Any other suggestions for vocal health, please let me know.
UPDATE: My second audiobook narration is now available on Amazon.com, Audible.com, and itunes! Here's the link to the audible.com site.