In OS X Lion Apple decided to hide the Library folder where most of your configuration and cache files are located. This is fine for most people, but for those of us who like to tinker it's a bit ...

This folder includes Applications, Library, System and Users but also includes a lot of hidden folders and files. Press Command + Shift + . to reveal them. How to find the System Library ...

Not only is the Library folder hidden by default, but there's enough stuff in there that it won't stand out. What's also nice about this is that you know where they're all stored.