Kind of an awkward title, but I'm talking about settings for your phone, your OS, your coffee maker, etc.

With all the tech in our lives, and with so many devices and software having quite a robust set of options for how they work, it's easy for us to not even know that something is available. How many cool things are we missing out on if we're just accepting the defaults?

So, what's a setting, on anything you have or use regularly, that you recommend to others?

What makes it so worthwhile?