Money
Usually about self-worth rather than finances. Finding money suggests recognising something you have; losing it suggests the reverse.
Dreams about objects
A car
Who is driving matters most. Brakes failing is a standard image for a situation moving faster than you can manage.
A mirror
A distorted or unfamiliar reflection is read as a gap between how you see yourself and how you are.
A phone that will not work
Almost always about communication failure with a specific person, and often about something you have not said.
Food
Beyond hunger, read as what sustains you — company, work, meaning. Being unable to eat is the more pointed version.