command line - Install Nvidia driver instead of nouveau

I've installed Ubuntu 14.04 and I'm experiencing a fuzzy/blurry screen and bad support for multiple screens.

I realized that Ubuntu installs nouveau as default, but I need to install nvidia drivers, so I tried this:

sudo apt-add-repository ppa:ubuntu-x-swat/x-updates
apt-get update
apt-get install nvidia-current
apt-get upgrade

Now that nvidia is installed, you need to blacklist the nouveau driver
so it don’t pop out when you will reboot. Create or edit the following
file:

nano /etc/modprobe.d/blacklist-nouveau.conf

…and add these lines at the end:

blacklist nouveau
blacklist lbm-nouveau
options nouveau modeset=0
alias nouveau off
alias lbm-nouveau off

I checked via the software & updates if nvidia driver got installed successfully, and it says the driver installed is nvidia 304.117

I then tried to run:

lshw -c video | grep 'configuration'

and the result is that the driver is still nouveau:

configuration: driver=nouveau latency=0

So how do I install and use the nvidia drivers?