Cardboard 
Dreaming of a pile of cardboard indicates a concern for wastage and the impact you are having on the earth. Dreaming of one piece of cardboard implies a habit of berating yourself for enjoying the finer things in life. To dream of creating something with cardboard suggests a desire to do the right thing by minimizing your carbon footprint.
Box
To dream about a box represents natural desires or devastating urges. You could also be attempting to guard some other area of your life. A box is also symbolic of restraints or deterrents.
To dream about opening a box signifies that aspects about yourself that were covered or guarded are being opened to the world. Think about how you feel as you open the box. If it causes you trepidation, you could be revealing parts of you that cause you anxiety.
Nail File
To dream of a nail file suggests there is work to be done before you can move forward in a situation where presentation is required.
To dream of filing down long nails indicates that attention to detail is necessary.
To be filing already too short fingernails shows a neurotic tendency to continue projects long after they are satisfactorily complete and ready to present.
Paper Plates
In a dream, paper plates symbolize transience.
To see a pile of dirty paper plates in a dream represents empty nourishment. You may be exhausted and feeling like no one is able to help you.
Paper plates from a party in a dream represent other people's problems. You may be tired of picking up their mess.
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