Evidence of the use of reflective surfaces for divination can traced through history. Use of a black scrying mirror (though a more  contemporary object); is likened to pool or water gazing...

Set the mood and lighting. A single candle, silence or soft music work well. Position yourself so you do not see your reflection. Ideally, an adjustable stand or support is recommended.

Gaze into the depths of the mirror, all may appear grey at first. Colors and images may come and go. Try to clear your mind from directive thinking. Relax, breathe deeply and scry.

With time and practice you should become increaingly more comfortable and begin to visualize and experience the divinatory powers of scrying.

Try to be patient, open and alert. What you see and feel may offer insights into the past, the now and what lies ahead...