Our spirit guides/entities or ancestors many times speak to us through our dreams.  It is best if you can keep a dream journal (a notebook) to write down what you remember in terms of any symbols, feelings, words, numbers, or events that occured while in your dream state.  All of these things will give you some hint to the spiritual messages that are coming through for you.  Once you gather all of what you remember, you can begin to analyze the meaning.

For instance, many people dream of water.  Water is very sacred spiritual and popular symbolization in all cultures.  For one we can't live without water so it has a powerful effect on our lives.  Viewing this from a spiritual standpoint, water can represent many things.  So the first thing you will want to analyze in your dream is - in what context did the water appear in the dream and how did it affect you or what was your relationship to the water in the dream.  You will need to remember some key elements or details about the water.  Was the water clear or dirty/muddy or cloudy?  Was it bath water, ocean/sea, river, lake water?  Was water flooding something or a place in your dream?  Did a pipe break?  Were you drinking water?  Was water in a glass?  Was it running water from a faucet or flowing water like a river?  Once you take notice to as many details, you will then want to take notice to how you felt in the dream.  Were you sad, scared/fearful, happy, etc.   Maybe the dream is an answer a question that you had, or validating some feelings or emotions that you are going through.  Maybe there's an action you need to take or not take.

Water can represent our unconscious mind or our emotional state of being.  It is a living essence within nature and of your psyche and the flow of life energy.  It can be symbolic of our spirituality, knowlegde, or healing abilities (internal or external).  Water can be viewed as coolness, peace, clarity, or a refreshment.  Water can also be reflective.  So depending on the context in your dream, water can have many meanings.  If water is boiling in the dream or the sea/ocean is turbulent, this can signify some type of turmoil going on your life.  Or maybe your emotions are out of control or brewing and you need some calm or some peace.  Or better yet, sometimes when our emotions are all over the place - we need boundaries or we need to learn how to place boundaries in our lives. 

We can probably write a book alone, on the many meanings. The fun part for you is taking the responsibility to decode what spirit is communicating with you...  Maybe other individuals on this blog have other suggestions.