Breakaway charge cable for my phone! They act like those old MagSafe chargers for Mac, and when I'm clumsy, instead of a busted off charge port, no damage! I also have curious cats who can test gravity without wrecking my phone.
I got one from Prime Cables that not only has a magnetic attachment to the computer, it has different tips so you can use it for USB Micro, C or Lightning. The cable itself has little magnets so it coils up almost automatically.