Shelf، To dream of a shelf represents ideas or opportunities that are waiting to be used.
To dream of putting something on a shelf represents putting off ideas or opportunities until a later time.
Example: A man dreamed of picking up a bottle of liquor off a shelf. In waking life he began speaking to a girl he knew liked him and whom he wanted to have sex with. The shelf reflected he awareness of this girl waiting for him to talk to her so he could have sex with her whenever he wanted.