I've included this because I feel it can be a very special ritual to help you learn more about yourself.
Be alone on a deserted beach if possible between high tide and low tide. Sit high enough that freak waves won't hit you. Sit comfortably facing the ocean wearing loose clothes. Close your eyes and focus on the mental screen of your forehead. Listen to the waves and think only of them. Shut down your senses until the only input is the sound of the waves. Relax and let the waves bring your back in time. Each wave a day, then a week, then a month, then a year, then a decade, then a century. Keep going until you feel that it is time to stop. Work with any images that come to mind. Try to make them clear. Where are you? Who are you? What do the buildings, if there are any, look like? What are people wearing? What does the landscape look like? What is your name? What language is being spoken? Can you see your face or anyone else's? Who is your closest friend? If you get scared, just take a few breaths, feel the sand beneath you and hear the ocean then open your eyes. Stay in this state until nothing else comes then move forward in time with the waves. View the information that you have gathered with caution until you look at it carefully. Remember that your mind can and will fool you if you are not careful. If you need cleansing, just let the ocean water brush your feet.