12.

Learn the NATO phonetic alphabet:

“Learn the NATO phonetic alphabet: Alfa, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu. It’s very helpful when trying to relay spelling quickly over a bad connection. It can also be handy for nonnative speakers at times, as pronunciation may otherwise get letters mixed up.”

—u/DontWorryImADr

Source: https://www.buzzfeed.com/ryanschocket2/things-learn-in-a-minute-useful-forever