Go to the Apple menu, "System Preferences", Keyboard pane, and browse the "Keyboard Shortcuts" tab. There will be all kinds of useful stuff in there, and you c

Go to the Apple menu, "System Preferences", Keyboard pane, and browse the "Keyboard Shortcuts" tab. There will be all kinds of useful stuff in there, and you can change anything you don't like. Remember that "^" means the Control key, the hollow up-arrow means the Shift key, the switch-symbol means the Option key, and the cloverleaf is the Command key. If you are feeling a bit adventurous, note that many Mac apps use Cocoa and their text fields tend to share the same text entry system, and people have even written extensions for it. You can tweak config files to change the behavior. The default is a bit Emacs-like, e.g. Control-A to move to beginning of line, Control-E to move to end of line. The traditional Mac OS keys also work, so e.g. Option-left-arrow or Option-right-arrow moves between words; Command-left-arrow and Command-right-arrow move to the beginning or end of the visible boundary of the line you're on; holding down the Shift key selects text as you use cursor keys, etc.