This greasemonkey userscript which adds "Save Draft" and "Load Draft" buttons to the Journal Editor.Requires:
Firefox 3+ and GreasemonkeyInstall - easy way
Go to my blog and click the install link: [link]Installation
To install, click Download, save the script and change the file extension to ".user.js". Finally open the script in Firefox, you should get a prompt asking you to install it.