"At its simplest it is just being prepared to listen to the sound environment
you are in, and think of the potential of every sound that you hear. At a more
complex level it can involve being constantly aware of how the world in which
you live changes sonically from moment to moment. You know how and when to
capture sound events, and often how to artificially create the sound you want
from the most unlikely and unusual sources.
"Sometimes quick reactions can reward you with an unlikely or rare sound bite,
but more often quite patience is required to capture the moment, like waiting
to photograph a sunset or a wave breaking against rocks." Stephan Schütze.
The greatest difficulty in recording clean sound material is that the world in
general is a noisy place, and sound travels a lot further than most people
realise. To capture natural ambience may require travelling out into the
wilderness, and unless you are prepared to hike for days you will probably need
to drive. Unfortunately others will probably use the same road that got you to
your excellent sound source, and the excellent high quality microphone you are
using to capture the clearest sounds, will also pick up the distinctive sound
of another car about 5 kilometres away.