I would set up a new Memorized Transaction group (in the Lists menu).  You can name it something like "Make Payroll DD."  Within setup, you can add it to your Reminders, set the frequency, and the date you want it to take effect.  Just be sure to have your Reminders set to display when you open your company and also be sure that Memorized Transactions are set to be visible in the Reminders preferences.  Hope this helps!