Memorize your mother's phone number!
I represented a young man yesterday who had failed to appear for a court hearing in a criminal case. As is common, the judge set a nominal bail - $100 - to assure he'd show up the next time. The defendant is allowed to make a phone call right after bail is set, and when a bail is that low, a family member usually brings the bail immediately and the defendant is released.
Yesterday, though, my client didn't know the phone number of anyone he could call. They're all in his cell phone, which was ... somewhere. (Cell phones aren't allowed in court, at least where I practice.) And, as is so common now, all his contacts used cell phones, so they're not listed in a directory.
It was awful - he could sit in jail for a month because he doesn't know his mother's phone number. I wonder how many young people would have the same problem? Made me come home and make Chloe repeat our numbers. She's known them since she was four, but even so!