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There was a time not that long ago when you had to be at home or at your office to access the Internet. This is no longer true, of course. Free Wi-Fi is available and easy to use virtually everywhere, from restaurants to airports to coffee shops.

Wi-Fi usually doesn't cost anything and you can hook up with little effort, but it's not exactly manna from heaven. If you fail to take the proper precautions, you could be making it all too easy for hackers to steal information you should be keeping to yourself.