Why would you want that? The best reason that I have found is for web-based email like Gmail or Yahoo! Mail. Rather than have your email in a tab in Safari that gets lost among all of the other tabs, your email has its own window and Dock icon for easy access.

(I'm not going to name names, but I know someone who usually has Yahoo! Mail open in several Safari tabs at once because he opens a new tab and reloads Yahoo! Mail every time he wants to check his mail.)

Pulling out a tab Click to see a larger image

One technique I use is to keep the tabs on a particular Safari window on the same topic or project and use multiple windows in Safari for my different topics or projects.

An easy way to help maintain this technique is to convert a single tab on one Safari window into its own window.

Here's how to turn a tab on the Bookmarks Bar into its own window.

Reading Liest Click to see a larger image

Stickies are useful and underused, but after that tip went out last week, I remembered that Safari has a built-in tool for holding temporary URLs that itself is underused.