Three fundamental laws of the Internet:
- Data Persists.
- Emails Escape.
- Passwords Break.
From which three injunctions follow:
- Don’t post or publish anything to the Internet that 5, 10, or 20 years from now you might not want people to see.
- Don’t write anything in a private email that you couldn’t bear to become public.
- Don’t be the weakest link in the chain: choose strong passwords, keep them secure, and change them regularly. (You can check the strength of your current passwords here and generate new ones here.)