I, for my public websites, use a custom/framework-integrated logging feature that logs each IP visit, the page, time, etc. If I need to analyze my traffic, i can easily remove, using perl, entries from known bots, i.e. googlebot, and also count how many unique IP hit per day. For the "hidden" more file-storage part of my website, I don't use any traffic logger, as I don't send many people to that section, and use it most to send file, store files or test html and such.