As much as we hate to admit it, it is often handy to email a quick note to yourself.
The Email to myself was created to do exactly that.
It is easy to hard-code email addresses into recipient fields in a Mail step, but this action uses a script to create a credentials to store the email address used in the action, so the first time the action is run it will prompt for the email to use and remember it - and thus does not need to be edited to setup a recipient.
It then sends the mail in the background to that address, with the first line of the draft as the subject and remaining text as the body.