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."
Do compose your emotions and appearance to hide any revealing information about yourself. Your facial expression, style of dress, personal mannerisms, and emotional outbursts can tell a psychic, especially a false one, a great deal about you to make it look like she knows all these things from a paranormal reading, when in fact, she is merely interpreting your physical appearance or reactions.