A Plasma TV wall bracket should not be purchased from the maker of your TV since it will be unnecessarily expensive. You can get a good Plasma TV wall mounting bracket online for less than $70. You can usually get a better price online than at a store, even when you consider the shipping cost. However, be sure to check that the shipping cost is reasonable, and check the return policy. Also, make sure that the bracket is the right kind for your TV.
After purchasing a good Plasma flat screen wall mount, you need to find the right place in the right room to mount your TV. The correct height is important; although most brackets will tilt so can make adjustments. It is also crucial to find the studs in the wall behind your drywall. The screws must go into the studs. Use a stud finder, which is an inexpensive item you can get at a store like Home Depot. Mark where you will drill, use a level to make sure they are completely level, and drill. Then install the part of your bracket that goes on the wall, screwing in the screws tightly. Install the other part on the back of the TV, being use to use the correct screws for your model. Have at least one friend help you lift the TV on to the Plasma wall bracket. You can also use cable covers to hide the wires if you desire, or carefully cut holes and hide them inside the walls.