The first step is learning to trust your hunches. Keep a journal of your hunches and you will learn how often you are right. Most of the experts we interviewed for our video mentioned journaling and the need to practice. Practice is the key. Your journal will show you if you were right.
Meditation is also important, just spend some quiet time alone.
You need to detach yourself from your feelings in order to make effective decisions and predictions. Learning the difference between impulse and intuition is also a key factor. It is important that you recognize how your intuition comes to you and you will notice a pattern. If you do get images, you need to learn how to interpret those images. Remember, intuition doesn't usually have a sense of desperate urgency and doesn't fade if you don't act.