If you have an indoor-use antenna, you'll want to place it as close to a window or, failing that, an exterior wall, as possible. If you have an attic, you can also install it there. It's all about reducing the number of obstacles a signal has to pass through before it can be processed by the antenna and sent to your TV. If you're using an outdoor antenna, you'll want to place it in a spot where it won't be obstructed by rooflines or dense trees. You can do this by either mounting it on an exterior wall or your roof to make sure it won't be blocked by trees or other homes.You may also want to consider getting a TV antenna with an amplifier. The good news is that these can boost signal strength to help you pull in marginal stations, The bad news is they also amplify noise. With today's digital signals, that's not as bad a problem as it was when analog ruled the airways, but it can still cause more trouble than it's worth.