Tim Gaden over at his Apple Mail blog talks about his setup in Apple Mail with GTD. In addition to the Delete, Action, Waiting For, Sometime (Tickle File), and File actions, he also uses MailTags keyword in Apple Mail to help him on some of the actions:
… The Action rule applies a MailTags keyword (Action) and changes the email’s colour in the Viewer window to red.
The Waiting For rule applies a MailTags keyword (Waiting) and changes the colour of the message to yellow.
Sometime applies a MailTags keyword (Sometime) and changes the colour of the email to grey.
File simply moves the message to the Archive folder on my IMAP server. With Mail.app’s use of Spotlight I find that my reference material and archive can live together in the same IMAP folder without fiddling around or a loss of productivity…
Got some things done in Apple Mail, Part II – [Hawk Wings]