Fonts can sometimes go bad. Font Book helps you locate fonts with problems and delete them.
The Finder’s Advanced Preferences control filename extensions, emptying the Trash and some search criteria. Here’s what they do.
The Finder’s Labels are handy for grouping files, while the Sidebar gives you quick access to files and folders.
The Finder’s General Preferences affect what you see on your Mac. Make sure they’re set how you like them.
Snow Leopard refines the Services menu and gives us several great choices with Dictionaries.