What do we have to remember about in order to care about the interior design at our house effectively?

What do we have to remember about in order to care about the interior design at our house effectively?
A variety of people, who regret their choices in the area of furniture often tend to say that they have made them in the atmosphere of considerable hurry. Thus, they regularly tend to think later that in this kind it is far better to start cooperation with another expert or at least ask someone like our friend or relative to help us make more appropriate move.