If you are asking for a big thing - something about marriage, moving, or health, for example - that's when you need the angels the most, but paradoxically that's also when it is the most difficult for you to hear them. When you get stressed and uptight, your communication energies shut down. So, what I like to do is ask the angels for a sign that I'm getting the message right. The prayer I use is, "Angels, let me know whether or not this is true divine guidance. Please give me a clear sign in the physical world that I can easily notice and understand."