Just wanted to add to this conversation that an often overlooked entry point are your data cables coming into your house. I've seen a lightening surge travel down a coax cable for a cable modem, fry the modem, exit the modem through the cat5 wiring, then travel down the cat5 wiring and fry everything connected to it. For this reason, I think it would be wise to surge protect the cable modem coax, teleco, and any Ethernet cable coming from outside - before any of those are connected to the rest of your home wiring. Of course these lines should all be properly grounded too. This is in addition to the whole home and local ups protectors others have described. Hmm now that you mention it, I have switched to Comcast Internet and while the coax is connected to a ground block and the modem power is plugged into UPS the coax is not connected to a surge protector. I think I will fix that today, thanks dueport.