How to Setup SSH Keys

Chris writes...

Hey Guys, I know Allan has spoke about using SSH keys to make SSH more secure but how would you set this up? I have the machine in question a desktop my parents use, i mainly use it to do updates and install the odd software for them . It is running Mint 13.

The pc connecting is a Mint 13 laptop and ideally my Win 7 desktop to, I have it all setup with users and passwords.

Thanks Guys Love the Show
Chris