I think we can all agree that the reason we hire a professional photographer for a project is because we want a reliable service, the best quality images that is possible and he or she would do everything that is needed to achieve this goal. This is logical, but we can not forget about one more component what might seem insignificant, however can have large impact on the final result. I collected a few from these situations that can make the environment much better for the photo session however it does not need much energy to take care of. I hope those who are preparing for a wedding or company event will read this and can learn something to cooperate better with the photographer for everyone's benefit.
Well, that is it for now, I will expand this list later...