ETE: 0010 (however many minutes it will take you to exit the SFRA)
route: DIRECT (or leave blank, depending on requirements of duat interface).
remarks: SFRA DUATS
altitude: VFR/025 (e.g. if planning initial altitude of 2500MSL)
Destination Contact: (I typically put an FBO number here, airport manager, whatever)
Everything else as usual. Note that you file an IFR flight plan, even though you plan a VFR departure. For your return flight, just reverse the 'departure' and 'destination'.