Hey, Sailor Mars!
I always thought Tarot cards were cool, but not magic. I remember reading-up about the I-Ching Divination stuff in China, and I'm super bad at referencing things(can you tell?) but what I think is useful about any sort of divination(cards, wheels, bones, and of course, coins) is that it imposes a decision upon you. Either to accept what is given, argue against it, or decide to look deeper into why you sought divination in the first place.
An example I like is the coin. Say, "Heads" you'll do X, "Tails" you'll do Y. Usually, depending on either, you come to a decision, ultimately. Whether it's to follow what the coin says, or go against it.