I am trying to set up Outlook 2007, (which has the 7 Habits add-in installed), and the ACT contact manager. I customized Outlook manually using David Allen's instructions in the first GTD book and then installed ACT. Should I have Outlook or ACT be the dominant calendar? Also, can anyone suggest how I will be able to use the GTD approach already customized on my Outlook to tasks emanating from contact activity in ACT?