Heh, some of my methods include throwing it at the wall (which I stopped doing because of the hole I put the wall!) or breaking the plastic tip of the phone cord by jerking it out of the wall.
More often then not my cell phone meets its end with the local parking lots. I have a bad habbit of putting the phone in my lap while driving then forgeting about it as I exit the car, phone always ends up smacking the pavement. This is why I use the el-cheapo phones that only allow you to make calls