Mounting a television isn't always an option, but if you have children running around, securing your tv is a must (your furniture too). Sanus Systems Anti-Tip Strap seems to have very good reviews online. It screws into existing holes in the back of the tv then to the table it's on and if you want, to the wall.
I don't have a television so I can't tell you I've used it but have any of you? Any other recommendations?