Is there a particular technique or tactic to reducing glare and reflections on interior windows during twilight photo shoots? I capture a few exposures (ambient and flash fill) and then brush them together in editing. Often times, the views beyond the window are obstructed by interior reflections.
Window reflections can usually be controlled by where you put your flashes in relation to where the camera is. It's a matter of being aware of the angles and moving your flash(es) around so you remove the reflections. If you are not shooting extremely wide, there should be a flash placement where they won't reflect in the windows.
Scott Hargis's book Lighting Interiors covers this subject extensively in two different chapters; Chapter 4: Controlling Window Exposure, and Chapter 11: Advanced Reflections. Scott's book covers all aspects of how to use small manual flashes to light interiors.