Gideon, in post #11 I gave the forbidden methods:

Terafim -- consulting idols which would include the aforementioned Jesus is forbidden. Zechariah 10:2.

Necromancy (communing with the dead) is also forbidden -- and this is what most "so called" clairvoyants claim to do.  Forbidden!  See  I Samuel 15:23.

Astrology is also forbidden.  Isaiah 47:13; Jeremiah10:2.

Keep in mind that prophecy (which is receiving messages from G-d and vocalizing them to others in your own generation) is dead (for now).  That does not leave much else!

סופי

And everything that Sarah tells you, listen to her voice. Bereshit (Genesis) 21:12