you can get a toddy cold press system- probably the most user friendly way to do it....they sell it at border's in the seattle's best cafe...about 30.00- i bought one recently and it's an excellent investment.
the one thing i LOVE about the toddy/cold press coffee is that it's so much less acidic than regular coffee- i used to just brew coffee and refrigerate it, but it doesn't have that same smooth quality that cold-press coffee does. plus, if you want to microwave cold-press coffee, it won't taste like when you re-heat regular coffee- no battery acid!
otherwise, i think you can take a pound of coffee and wrap in a cheesecloth and tie it- like a big teabag- place in a big container (non-reactive pot or plastic containter) with about 10 cups of water. leave for eight to twelve hours. then take coffee out (i would also strain the liquid- maybe through more cheesecloth to get rid of the 'silt,') and, voila- cold coffee!
this is a concentrate, by the way - i think you are meant to use one part coffee to 2-3 parts water. but, i like mine strong, so i go about half and half if not stronger.
i think that the toddy is the way to go- for me, at least, the convenience of it is awesome- you do basically the same thing, but in a plastic container that has a filter in the bottom. after eight hours, you just uncork the container and let the coffee filter down. easy cleanup, no fuss.
my new favorite thing!