What is the most professional way to hang pictures and mirrors on new walls?

So that I do not tear up the walls trying to hang them?

OF COURSE THIS WILL DEPEND ON THE SIZE AND WEIGHT NEEDED TO HOLD THEM UP. MOST MIRRORS HAVE SPECIAL HANGING KITS AVAILABLE AT HARDWARE STORES.THESE KITS ARE ALSO SUPPLEMENTED WITH TWO SIDED MASTIC STRIPS THAT ARE ADHERED TO BACK OF THE MIRROR AND ATTACH TO THE WALL WHEN U HANG THEM. THEY ARE VERY EFFECTIVE.
AS OR PICTURES FRAMED OF COURSE, LIGHT ENHANCED WITH DIRECT OR INDIRECT DEPENDING ON THE SIZE AND HOW U WISH TO HIGHLIGHT THEM. A STANDARD PICTURE WOULD PROBABLY TAKE A MOLLEY SYSTEM INTO THE SHEETROCK IF THAT IS WHAT U HAVE ON YOUR WALL. PRESCREW A SMALLER HOLE AND PUSH IN MOLLEY. A HOOK SCREW WILL GO INTO IT
AGAIN CHECK A HARDWARE STORE FOR THERE ARE NUMEROUS TYPES AVAILABLE

Drill and put the screw and hang it. Drill have to buy Bosch and screw have to be in stainless steel. When you hang it have to use the balance ruler to balance it.

Straight Pins (two at a time).

You have to judge size and weight, then how permanent is it going to be and what type of wall is it. I have a variety of wall hangers from concrete walls to wood to regular Sheetrock. I use screws and nails to hangers to mirror hangers. I've never in 47 years had one fall.

Measure from the ceiling, there the most level, then get a center, of the wall, then decide from there where on the center line the party wants that certain picture. In a grouping, I lay them out on the floor, they usually change their minds several times so, I don't rush, I interchange them until they're satisfied. Then I hang them that way.

the 3M products are fantastic for this

I am assuming that you found the area on the wall to put the pictures. So on to putting it up. If its light enough there are many adhesive hooks that you can use, 3M makes many styles and sizes, that remove clean. Prior to applying them, make sure that the picture is going to look right at the height and position, you may need to shift it to the left or right to set a symmetry or pattern. Easy way, have a friend hold the picture while you look at it from a few steps back, watch out for glare on the glass. Once you like the position, make note of the location of the frame hanging bars or wire. Place the hook, hang, and enjoy. One of the great things about the adhesives, is that if you need to move it, there are no holes to patch if you need to move it.

OOK's Pro Picture Hangers are the best. They hold enormous amounts of weight and don't damage the wall to much.
http://www.ooks.com/cart/category.cfm?ca...