Sticky notes with sensitive information
Your employer expects you to remember ALL of those different passwords? What better way to organize them than to write them all down on a sticky note, right?
Wrong. Even without spelling out exactly what those passwords are used for, an industrious criminal or hacker could use them to gain access to private accounts.
Takeaway: Don't write down passwords anywhere, especially not on display on your computer. Use a simple memory system to keep passwords straight.