The idea is to add a reminder/timer that allows to see the last time you did each daily.
Maybe with a command like #ii (but in this case #dl):
or integrated in the statistic window as a new tab "Daily"
or when you start the client, it writes the infos about daily jobs (like the info about global quest)
or when you ask your kinect-voice-recognization-module it will project a sexy 3D Hologram of Lillaka telling you with a mellow voice the info you asked for. (yes it is possible with Microsoft Research's IllumiRoom)