If you have ever worked with web forms you know that editing a large amount of text can be painful when you can only see a few lines of text at a time.
Firefox 4 has a nifty feature that gives you draggable resize icon on the bottom of all textarea boxes. This is nice, but rather than have to resize a field every time, I like this trick. Just by adding the onclick and onblur tags to the textarea box as shown below you can make the text box EXPAND when you click into it to make it easier to edit.
Adjust the rows as you see fit.