Meditation: Clear your mind and visualize the archangel surrounding you, filling you. Then call him near and tell him what you need. Close the prayer with thanks to the spirit and happiness, belief that you are protected.
Writing a letter: If you have trouble meditating, you might want to sort your feelings by writing. It helps you with imagination and it helps you organize things. Take as much time as you need for the letter. Don't be worried if you are unsure, just go with what you feel or think is best. Finishing the letter: You can read it aloud to your archangel, burn it, or bury it.
Or you can use the archangel's character to determine your best approach. If your archangel likes nature, spend some time with nature, and call your archangel there.