Since I do a lot of website work, I have to log into a remote server I run fairly often. In addition, I wanted to set up some scripts that would automatically back up stuff from my local computer to that remote server, and vice versa.
However, logging in to that remote server requires entering my password, which is a pain as often as I have to do it, and which would make it impossible for the backup scripts to run automatically.
I found a great overview of the steps necessary to set up passwordless logging in through SSH, and they're pretty simple. I'm posting the link here just so I can find it in the future.