A spare key can be a lifesaver if you've ever accidentally locked yourself out of your home, or when you're traveling and visiting pet-sitters or a trusted neighbor need to access your home.

I thought that a type-B USB plug was a type-B USB plug. But some sources say that type B is 4 pin, while others say it's 5 pin.Are they confused or am I?

Avoid tucking your spare key on top of your doorframe, as it is not as inconspicuous as you might think. In fact, according to Shahidi, “it’s a widely known tactic that provides no real deterrent.