Principles

-> sorting by Unique IP is generally a pretty good thing

-> I should personally always use a unique user-agent string, because I tend to access from a variety of different IPs. In Mozilla, in about:config, setting general.useragent.security to "-Interiot-" is a good way

Command-line tools

• a tool that will output the first 1-5 lines from each IP address seen (~/apche/ipanal on the toolserver)... allows one to do reasonable referer and uniqIP analysis
• referer is $F[3], useragent is $F[5]