You may not know but your Subconscious Mind knows

The term subconscious is defined as existing or operating in the mind beneath or beyond conscious awareness. The word was coined by the psychologist Pierre Janet, who credited it with a hidden level of awareness and automatism. In the strict psychological sense, the adjective is defined as "operating or existing outside of consciousness".[1] The term also appears in Sigmund Freud's very early work, to denote the unconscious mind but was soon eliminated due to its ambiguity.[2] It may also be used to describe the preconscious, information contained in the mind, which although not presently in the conscious, may be recalled by "directing attention to them", such as memories not being recalled at present, but still available to be recalled at will. Use of the term "subconscious" is avoided within academic psychology[3] but remains popular in common use and other academic disciplines.

There are a number of methods in use to try to directly affect the subconscious/unconscious mind, primarily the following:

Affirmations
Autosuggestion
Binaural beats
Hypnosis
Subliminal messages

Source: Wikipedia

The way to get in touch with your Subconsious Mind is through Meditation. Get yourself into complete relaxation through Meditation just before going to sleep. Ask the question you wish to know the answer to and wake up with the answer.

You can also obtain the answer through divination. The pendulum is a witch's powerful and helpful friend.