Protect your mobile gadgets with apps such as Lookout Mobile Security. They’ll warn you when you're on an unsecured Wi-Fi network, detect security flaws in your other apps and prevent you from clicking on fraudulent links.
Look over your shoulder
Not all dangers in the digital world are high-tech. While you're watching the world go by in a busy airport lounge, a snoop could be literally looking over your shoulder with the hope that you might reveal a username, password or credit card number.
It's called shoulder surfing, and it still works.
Preventing this is equally low-tech and effective. Just exercise a little healthy paranoia!