One of the great things about GTD is that you have options. Do you have an @Action folder in Outlook? This can be place to put all emails that require a next action. When you move the email to that file, you can change the subject line to indicate the next action on that email. The caution is that you now would have another place to look for next actions. The value is that you have the email still there with a next action already determined. Open that file up and you are ready to work!
Nancy, I do have the Action folder in Outlook. I have not implemented the idea of changing the subject line to the next physical action. I like it. Very helpful. Mark