Powerline Adapters to access the Internet
Simple concept. You have a computer somewhere in your home where you have a weak Wifi signal. With a powerline adapter, you plug in your ethernet connection into one adapter near the router. Plug a second adapter in near the computer you want to use and connect the second ethernet cable in and the Internet is now available. The concept is that with a powerline adapter, you use your electrical wiring in your home to carry the Internet signal through your home to where you want it to be. Check out this CNET video tutorial on how to do it.