These are from an interesting site called Make Tech Easier, listed in order from oldest to newest:

• How to use SSH X-forwarding to Run Remote Apps
• 2 Useful SSH Tricks to Improve Your System Security
• How to Secure Your Internet Connection via SSH
• How To Take Secure Remote Backups Using SSH
• How to Generate A Public/Private SSH Key [Linux]
• An Easier Way to Generate A Public/Private SSH Key Via a GUI [Linux]
• How to Kill An Unresponsive SSH Session [Quick Tips]
• How to Protect Your SSH Server With Fail2Ban [Linux/Ubuntu]
• How to Enable Two-Factor Authentication for SSH Connection
• How to Keep SSH Connections Alive In Linux