You probably know you can drag tabs in and out of windows, but there's also a lesser-known shortcut in the tab management family: Middle-clicking a tab's title box will cause the tab to close.
Middle-clicking has another hidden use throughout Chrome: It will cause a link to open in a new tab in the background, so you can continue working in your current tab without interruption. It'll work with a link on a Web page as well as with an item in the drop-down list that appears when you type into the Omnibox.
