Put a Lock on the Door!
Unauthorized users can steal bandwidth from you. Someone in the neighborhood might share your bandwidth without your knowledge. There are ways to test if there are any unauthorized users, but an ounce of prevention is better than a pound of protection. To protect your home network from the bandwidth thieves, set up an access password to your router and change it from time to time.
Location, Location, Location
Location of your wireless router affects the performance of your home network. You might think that putting the wireless router and all the unsightly cables in a cabinet or the spare room is a good idea, but it can dramatically reduce the bandwidth available to you. Wireless routers in contrast to wired routers need open space to work well. Obstructions, such as walls, large furniture, and other electronic equipments can interfere and reduce the power of the signal.