Lock Your Computer Every Time You Walk Away — Make It Automatic

An unlocked computer in a shared space is an open invitation — to a prank at best, to data theft or impersonation at worst. It takes someone three seconds to send an email from your account, read your messages, or install something you will never notice. And in a corporate environment, it can be a compliance violation.

Build the habit of pressing Win+L (Windows) or Ctrl+Cmd+Q (Mac) every time you stand up. Better yet, configure your computer to lock automatically after 1-2 minutes of inactivity. It costs you nothing and eliminates a category of risk you never need to worry about again.