hi i would like to ask a few questions. 1)can a person sleep with his head pointing towards the door and under a window? 2) i have read that sitting with your back facing a window is bad because it means lack of support. the remedy given is to cover the window using a shade. however if there is no shade, can i just close the window? 3) if i am 'big wood', sleeping in a room full of electrical appliances is better or sleeping in a room full of metal shelves? 4)i have read that it is not advisable to sleep with a mirror facing or near me. does a computer monitor consider a mirror? if yes, can i remedy by using a cloth to cover it? 5) is there any 'harm' done if i sit with a fan mounting on a wall behind me blowing across the room?