Find the right place on the wall with a stud-finder. This will help to “ensure that your perfect, glare-free spot” has the proper support. You’ll most likely need to use one stud for an LCD and two for a plasma TV.
Tuck away the cables. Cut one “outlet-size hole” with a drywall saw near where the cables sprout from the TV. Make another one directly below, near the floor. Once you’ve gathered all your TV wires together with electrical tape, “feed them in through the top hole and out the bottom.” Use grommets to clean up the holes.
Level off the flat screen first and then hang the “VESA-compliant bracket with anchor bolts.” After attaching the rails to the TV, “have a sure-handed friend” hold the set while you connect it to the bracket.
Source: Wired