Hirospacists need guts to do it. Tea Leaf readers do it with the right grounds. Crystal seers like it on the rocks. Dream interpreters do it Jung. Aromatherapists do it with good scents.
Psychics do it in their heads.
Mediums do it 'til the table tips. Metoscopists do it in lines. Wiccans do it in circles. Pagans druid 'til they drop. Querents do it very carefully.