Proper planning will ensure that you get the most out of the significant investment involved with a home theater system. You will have to select and measure an optimum viewing space, determine your requirements and select components such as a TV, DVDs, video game consoles and speakers. There should be no windows within six inches of the screen. You should sit a distance from the screen that equals two to three times the diagonal length of the screen. The TV should also be positioned at a comfortable viewing height. Contact a professional if you need help designing your home theater.