I'm still unclear as to what you mean. Are you talking about scrying with mirrors specifically?
Scrying is the art or 'seeing' or allowing your eyes to relax and connect to the part of yourself that will intuit messages (some would say it's your HGA, higher self, subconscious, or even that it's not coming from you) to project meaning onto the medium (in this case the item that you have chosen) to discern messages. Many folks use the term in reference to multiple reflective surfaces, Crystal balls, mirrors (People have always attached great significance to mirrors), and pools of water (outside or in bowls)...heck, I've done it in a black pool of soy sauce. It's not the medium looking at the medium-it's the message. *silly pun*
Some people even use the term scry to refer to other forms of divination like reading tea leaves, or using the clouds or whatnot-I do, but I think that's a bit lazy on my part. Technically those forms of divination are not the reflective surface type.
So I would suggest a few things.
1) think about which kind of scrying or divination you are interested in
2) check some of the old threads here first. I know this place has to be loaded with good info.
3) go beyond the forum and read or google a bit first and then let me know what you're thinking.
Alternately, someone might just intuit what you specifically mean and just jump in. That's cool too.