well now i've been doing it for 5 months i have discovered i always get a cold the week i'm on, a little bit of chocolate
does help, vocal warm ups are amazing, if there's more than one singer follow the keyboard not them as keyboards are more likely to be in tune....prayer also does wonders, and don't look at your friends
Since i started another two have joined me so i'm not on every week anymore, i'm on the next 4 weeks in a row in one form or another (choir morning, singing evening, singing, singing, choir) though which i'm so pleased about

i love being up there, i just love being surrounded by musicians, though i wish the stage wasn't so high up, you do feel like the focus of everyone's attention (even if they're only looking above you for the words).