Once given the brief for an editorial shoot my next job is to scout for locations, its the same if I'm photographing for a magazine or a family shoot for holiday cards. Preparation is "key" to producing beautiful images.
When I look at potential locations for my photo shoots, I always try and visit the place at multiple times during the day. This gives me an idea of the lighting at different times. Not all light is created equally, early morning light is generally soft and subtle. The light at mid day can be harsh, especially if there is no shade to work in. Evening light tends to be more warm and golden hue hence the term "golden hour" an hour before sundown. Post-sunset light is blue.
Little details are really important for me to be able to plan my day and photo shoot, yes no one wants the "perfect" image ruined with unexpected "photo bombs", so time of day is also important.