In my Company SOP we are setting T/O Flap position just before starting Before Taxi Checklist and never check Flight Controls item before we confirm Flap position and Green Light On. We are not allowed to start taxing before doing it in this manner even when in rush, but better be 30 seconds later then taking off without T/Of laps. In case of Cold Weather Operations where flaps may be required to remain in up position diring taxi due to contamination and/or de-iceing, we always use additional Cold Weather Before T/O Checklist where T/O flaps are additionaly checked. Try it and see how usefull it is.
