i agree with what early riser just posted ..
the best way to allow yourself to be able to forget you have
a camera you are working with, is to be 1 with it, and know
how it will react to everything you will do. the "it"
is the camera, the scene / person / subject, film, developer,
paper, and developed out image ( or numericize if that is the route you go ).
once you are plugged in, you can unplug yourself and not think about any of it.
and the best way to plug yourself in, is by using a camera, film/paper an awful lot.
( and to enjoy yourself )