Everybody knows that Safari has bookmarks. But did you ever think of the advantages to organizing your bookmarks into folders?
By organizing bookmarks into folders, you can clean up your bookmark bar and easily access groups of sites with 1 click.
You can organize your bookmarks by clicking the “Show all bookmarks” button located on the far [...]

If you want to quickly zip (or archive) a group of files, select the files, Command-click Control-click and select “Archive”.

To increase the font size of a webpage on Safari, press .
To decrease the font size, press .

From time to time it may become necessary to force quite an application. To pull up the Force Quit Applications dialog, press . Select any application from the list and click “Force Quit.”

Control+Alt+Delete

Dave Polaschek has compiled a list of Magical Macintosh Key Sequences:
This is a collection of the (poorly documented) key-sequences that do things. It’s probably possible to find all this information within Apple’s Knowledge Base, but it’s currently scattered across multiple entries.
[Found Via TUAW]

You can drag a background window by holding the key while dragging.

[Via OSXFAQ]

MacWorld has an interesting article on using Preview:
Tiger’s viewer application can do more than just perform basic tasks. It can also edit images, capture screenshots, display folder images and much more.
[Via LifeHacker]

I’m sure many of you already know that holding Command and clicking a link will open the link in a new tab.
Did you also know that if you hold Shift while pressing Command and clicking a link, the link is opened in a new tab and it is made active.
Bonus Tip: You can also / [...]

An easy way to close all of Safari’s tabs except for the current one is to press .
You can also close the current tab by pressing .

To get more information about a file, select the file (you can also select multiple files) and press .
This will bring up an information dialog such as the one below:

If you selected multiple files, multiple information dialogs will appear.
If you wanted to show a summary of the selected files (information about all of the selected [...]