As humans I think we rely on our sense of sight most frequently, but sometimes allowing our other senses to take over can open up new possibilities. For a photographer, this may mean hearing a stream off trail or the call of a bird.
In particular, using other senses for wildlife photography can be particularly helpful. Listen for the bugle of a distant bull elk during the rut to find the direction to seek him out. Look for scrapings on trees to see where mule deer bucks may have passed through an area. Listen for the faint rustle of leaves to find a small mouse or rabbit hiding in the brush. Pick up the scent of a bobcat through the smell of its urine. If you are really ambitious (and I can't say I go this far but I have seen others do it), use your sense of touch to see how fresh scat may be on a trail.
Putting all of your senses together rather than looking at the obvious may help you find an animal faster and in an interesting activity for a great action shot.