Smart Tab Multitasking In Opera

Just like you would with windows on your computer, you can cycle between tabs on Opera by using the Ctrl+Tab shortcut. But Opera takes this common functionality a step further by altering the switching order based on which tab you've most recently visited.

It's not enabled by default, however. You will have to manually go into the Settings then click on Advanced and under 'User Interface' activate the 'Cycle tabs in most recently used order' option.