Cookie/biscuit dough is always awesome to freeze as you can make a double or even triple batch and freeze what you don't bake. This applies especially when the type of cooking you are making is shaped by slicing it from a log of cookie dough. Just form the log then wrap it tightly. When you want to bake it, bull it out of the freezer and let it defrost in the fridge then simply proceed as normal.
When it comes to drop/scoop cookies (those shaped by portioning out the dough into balls) then it would be best to form these balls and then freeze the dough. This also applies to those cut from a sheet of dough.
Just ensure that you wrap it very tightly with al-foil and plastic wrap to avoid it drying out or suffering from freezer burn.