For the method of Feng Shui I teach, yes, this is a foundational suggestion for clients who do not practice this habit already. Let me offer a bit more psychological and spiritual explanation to help you understand the benefits.
This habit of making your bed may seem small and insignificant, yet a greater development within your conscious and unconscious minds is developing. This simple act becomes your first accomplishment of the day and it only requires 1-2 minutes of your time. This also creates a mindset of being organized, which helps to reduce stress, increase motivation and inspiration.
When it's time to retreat back into your bedroom for sleep, there is no need to fuss with preparing your bed, It's already been made. This creates the mindset for a zen-full night's rest.
Looking at this Feng Shui suggestion from a spiritual perspective, making your bed sends a strong message of self respect. You choose to take the time and create a space that nurtures and positively recharges your energy, body and emotions. This is a great habit to maintain when sharing the bedroom with your partner or if you are in the process of manifesting a relationship. This suggestion is wonderful for both young children, teens, adults and seniors.
Keep this in mind, how you treat your home becomes an extension of how you treat yourself and how you allow yourself to be treated by others.
Feel free to explore these Feng Shui Tips and discover what is best for you.