Tabbed browsing in Safari is one of the best features iOS 5 brought to the iPad, but did you know that you can easily restore recently closed tabs? It's so simple and useful, you'll wonder why you never knew it was there.
If you accidentally closed a tab, to reopen it, simply tap and hold the new tab button. That would be the button with the + sign on the right. A small window will pop up, with up to five of your most recently closed tabs. Tap on one of them, and it opens in a new tab. That's it--tab restored.
Via: iPad Insight
Source: Right Now In Tech