My PC's specs: GPU: GeForce 7600GS, kernel: 3.10-3-amd64
The basic steps are:
sudo apt-get install nvidia-kernel-dkms linux-headers \ nvidia-settings nvidia-xconfig sudo nvidia-xconfig
The last step is running
nvidia-xconfig to set everything up. That should sort it all out, including blackisting the
nouveau driver if you were using it. You'll have to reboot for it to take effect (well, you don't have to but it is much simpler that way).