You get bonus points for installing drivers before you install the operating system.
The motherboard cd tends to come with a full suite of slightly outdated drivers, I tend to just use these then download whatever nvidia are offering at the time for the card. Downloading the latest is a better approach, but all except ethernet driver can generally be done on the computer you've just assembled anyway.
The ideal if you repeatedly trash the operating system (which I do at least) is slipstreaming the drivers onto the cd you install with, through nlite or vlite. This doesn't tend to work so well with sound or video drivers, but you can certainly reduce how much you do post install.