User login

Limit writing or jotting down your login information on a note and avoid sharing your password with your friends and colleagues.

On a related note, it's well worth setting up your own account on your computer or your browser or your tablet to keep other people away from your important accounts. From the security perspective it's always best to limit access as much as possible.

Many a vulnerability comes through outdated software, so you should always make sure your operating systems and browsers are right up to date to keep your computer secure and by extension the online accounts you access through them.