Find a safe spot to hide and start a dream, being in a dark room is the safest bet, do it even if you have to dream while going to work, otherwise, enter the cinema and choose a boring movie (a comedy will suffice). Don't sit near the alley. Also, flatten the seats; sleep while sitting can be a disaster. If you have the stem of a tomato, smell it to dream in color. Be sure to start with the most irrational mental image possible!
Turn your body to the right so that the left side of the brain drains the blood to the right hemisphere. Before the real dream starts, be sure to say to you, "I want to change my soul".