Dashboard - A world of widgets awaits you

Dashboard is a Mac OS X application that overlays a pane of "widgets," simple applications that you need quick access to but not all the time. Simply click the Dashboard icon in your Dock, or press the hotkey on your keyboard (F4 by default on newer computers), to activate Dashboard. You can assign a specific hotkey in the System Preferences or even a mouse click, such as Shift and Right-Click. Once in Dashboard, click the plus sign (+) in the bottom-left corner to add widgets to your Dashboard. Just drag and drop the ones you want. You can also close widgets by clicking the X in the left corner of each widget. Mac OS X has some great widgets built-in and you can get more on Apple's Dashboard webpage. Check out the following video for a quick demonstration.

Quick Look - The easiest way to quickly view your files.

With Quick Look, simply tap the spacebar to preview pictures, movies, or music; even PowerPoints, PDFs and spreadsheets can be Quick Looked. Added as a feature in Mac OS X 10.5 Leopard, Quick Look received a small update in 10.6 Snow Leopard to allow the user to Quick Look right on a file's icon. Check out the following video for a quick lesson on how to use Quick Look. View the movie in HD for a better view.

Searchable Help Menus in Leopard and Snow Leopard

Having trouble finding a menu item in a program? In Leopard and Snow Leopard, the Help menu is fully searchable, which means finding a menu item or information about a program is easier than ever. Just click the Help menu and begin typing whatever you're looking for, such as "styles" as is shown in the picture.