Look at the edges of the viewfinder:
* frame the shot; look at the corners of the viewfinder to avoid any unwanted subjects
* keep an eye on your main subject, make sure the subject is not cropped in the viewfinder
In the above shot, the model's feet are cropped, just by moving the camera slightly down will allow enough room for the feet.
Bhupinder Ghatahora
Ghatahora Photography