I think of Tarot as a tool to guide people through the sometimes rocky road of life. Tarot cards help empower individuals by showing them that they are in control of their destiny. Tarot reading can show you your challenges as well as your gifts. They can help shine a light on the correct path to take when creating new ideas, relationships, careers...
Tarot is magical in that it can help you understand that you are the creator of your own life. They can help you gain a deeper understanding of yourself and the energies around you. It is true that you cannot control the actions of the people in your life however the tarot can show you the various nature of the people coming in and out of your life and how to balance those relationships.
The Tarot, when used as a guiding post can help you manifest your dreams and desires. They can help you see the things that are blocking you or the people that are holding you back. They can show you the way to achieving your dreams. Ask and it shall be given. Be open and you shall receive.