Originally Posted by deniah

if using phone:

-flash off (!)
-phone on vibrate so no shutter sound (depends on model)
-most shutters can be operated by external volume button ... meaning you can grip the phone as if just carrying it (rather than composing with it), and snap photo with thumb or index finger

-if you attach headset with in-line control unit, typically shutter can be tripped from there as well. so you can hold phone up as if reading from it normally, and fire shot from the mic piece