The psychical researchers Eric Dingwall and Harry Price re-published an anonymous work written by a former medium entitled Revelations of a Spirit Medium (1922) which exposed the tricks of mediumship and the fraudulent methods of producing "spirit hands". Originally all the copies of the book were bought up by spiritualists and deliberately destroyed. In 1923, the magician Carlos María de Heredia revealed how fake spirit hands could be made by using a rubber glove, paraffin and a jar of cold water.
Before any reading, be sure to shuffle (or "clear") the deck. This deliberate gesture should become a meditation. Feel the physicality of the cards in your hand, visualizing your question. If you're reading for another person, use this reflective moment to get to the root of their situation and help you formulate specific queries for them. Take as long as you need. Clearing the deck is a critical first step in reading tarot cards, as it opens the pathway between spiritual dimensions. Whenever you're ready, cut the cards into three and reorder the pile, face down. On your favorite cloth (be precious with your tarot deck), prepare to pull cards for your tarot "spread."