Baptism by Water
Fill a tub halfway with water, at about waist level, then sit in it, and turn on the shower and make the water as hot as you can stand it (do not burn yourself) and meditate to awareness. If you do not know how, simply breathe and god may guide you, and once you awake, or the tub becomes full, stop the water, then lie back with your head half submerged and listen, and you may come to know of your sins and how to absolve them.
Baptism by Fire
Cook a meal with meat, preferably fish, and add enough spices until it is so spicy it hurts, and do not pray over that meal. Then think about the person or people for which you have caused injustices against and meditate until awareness, and listen and wait for them to forgive you or tell you what they think should be your next steps.
Conducting a Seance
Run a bath with water at the temperature you, or the spirt you wish to summon feels most comfortable, and place a towel over the side with three offerings that the spirit in question might want. Bring with you an object that you treasure or one that is divine (such as a bible), and surround it with three candles and place it nearby. Relax in the tub and meditate until a spirit comes to you, and know that if you bring less than three candles or offerings, the spirit may interpret the offering as the object or yourself.
In all of the above cases, have someone with a strong spirit nearby that you trust, so that your spirit remains in control and you do not do something foolish.