Machines you do not control.
WHAT TO ASSUME
That anything you type may be recorded.
WHAT TO AVOID ENTIRELY
Banking Anything with significant consequences
WHAT TO DO IF YOU MUST SIGN IN
Use a private browsing window Sign out completely afterwards Change the password afterwards, from a device you trust
WHAT NOT TO DO
Allow the browser to save the password Leave files on the machine Leave the machine unattended while signed in
WHAT TO CHECK BEFORE LEAVING
That you signed out of everything That nothing was downloaded and left That no document remains open
WHAT TO BE AWARE OF PHYSICALLY
People able to see your screen Cameras
WHAT TO USE INSTEAD, WHERE POSSIBLE
Your own phone, on your own data.
WHY
It is almost always safer than a machine you do not control.
WHAT TO DO ABOUT WORK FILES
Never leave them. Use a service, and remove any downloaded copy.
WHAT TO NEVER USE
A public machine for administrative access to anything.