I learned to use a pendulum in India, whilst on my honey moon. We did not make plans but let longings and chance meetings guide our path. Sometimes we were really stuck with choices and used a pendulum to decide. The choices were always perfect and since then it is part of my kit.
These have an added value with the cards that you can use to get in touch with your higher self, and they are made by a healer so the energy is true and good.