Tarot cards can't predict - strange as it may sound, it's not like the cards have answers to all your questions. It's more about signs and symbols that give you indications about what's going on in your inner spiritual space.
So if you ask a tarot reader, 'Who will I marry,' the most likely answer you might get is 'look within!' Instead, ask something like, 'How will my personal relationships progress.'

Ask the right questions

Where can tarot help you - in every aspect of life, to put it in one line. When you feel like you aren't getting anywhere - be it work or a relationship or a general outlook in life, a tarot reading can help suggest new directions that you can take.

New venture

A tarot reading can help you get a clearer perspective on what factors you need to consider before taking the plunge into a new project or a new relationship. You could also go in for a reading close to your birthday or another significant event of your life so the tarot can suggest how you can begin a new phase of your life.

Uncertain nature

Tarot can be effective with offering a different view to an old situation. For instance, if you don't know where your current relationship is headed, a reading could throw some light onto what you really want, and then you can decide on a future course of action accordingly.

Looking within

A tarot reading can give you a lot of insight into your own self - how you really are, how do you view the world and what your deep seated aspirations from life might be. If you're looking for a better understanding of your own self, a tarot reading might be an effective beginning.

Subjective arts like tarot readings can hardly be judged on parameters of accuracy. Their effectiveness is entirely based on your belief! And belief is the science of mind.