I once brought in an afghan of my grandmother's to my session (in the winter :-) and covered my lap with it Bring in something you love from home or wear your "favorite" outfit? Whenever I'm confronted with something big and new like that I work to make "my" space smaller and homier and more to my liking. Take "control" of the chair you sit in and move it a couple inches

Just manipulating the environment like that can give you a better feeling of it being "yours".