What's the proper way to install NVidia drivers now? [duplicate]

You simply need to open the setting menu for ubuntu, Click "Software & Updates".

Select the far right tab "Additional Drivers" and wait a few seconds for Ubuntu to build a list of drivers you can use.

It should looks something like this:

Note: you may see different drivers than me.

Make sure to pick the one that has the message (proprietary, Tested) next to it.

Once Selected click "Apply Changes" let it do its thing and reboot.

This is the safest way I have found to do this without my system losing X11 after an update or upgrade. Some Desktop environments perform better under the opensource driver while others you can see little difference. I have noticed with unity on ubuntu that the minimize animation can sometimes show some artifacts while using the Nvidia Driver, but other than that it performs much better in all other respects.