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The easiest & fastest to set up & see the referrals is to try a software package that resides on your desktop & crunches the log files that you ask them too & it will output usually in html format, nice graphs & all.
The later, unless you know how to set it up on your server, you'll need to do some reading to configure.
Nowadays most host comes with some stats program installed from the site manager waiting for you to activate it.
To have a list of sites/programs to try head on to
As to what people here use, there are over 160 messages in this thread on that very topic:
Hope this helps.
I am so impressed with it, that I am thinking of offering it to my hosing customers as a low cost service, which is something that the script makes it easy to do.
Best available that I know of, for a free script.