The dangers of using the same password for multiple accounts include:

1. Risk of having your account breached and multiple accounts compromised at once
2. Increased vulnerability of automated hacking attacks
3. Accounts become more vulnerable to pretexting, phishing, and pharming techniques

To keep your accounts safe, it is recommended to:

1. Use a unique password for every account
2. Make passwords at least 8 characters long with a mixture of letters, numbers, and symbols
3. Change passwords on a regular basis
4. Use a password manager to keep track of passwords securely
5. Never share or store passwords in plain text
6. Enable two-factor authentication on accounts if possible