What is Reddit's opinion of Light: Science and Magic: An Introduction to Photographic Lighting?

From 3.5 billion Reddit comments

"Best way" is to avoid them in the first place.

If you don't want reflections, don't shoot through glass.

Or, consider that glass has a little of the characteristic called 'direct reflection'. The reflections that you see, are 'direct' reflections of the light sources that fall within the family of angles (angle of incidence equals angle of reflection). So you could place the camera (or lights) so that the lights are outside the family of angles, thus the reflections wouldn't be in the photo. Or you could eliminate or block the light sources from being able to fall on the reflective surface.

Next, you could try using a polarizing filter, which helps to remove polarized direct reflection. This may or may not help, depending on the surface you have. In this case it would probably help, but may not completely eliminate the reflections from showing up in the shot.

Light: Science & Magic

If all else fails...I guess you can try to fix it in post.