First of all, you need to find yourself a dark room. It is better if you practice this during the night, but if you want to remember something with this method during the day then you will need a really dark room.
Carry a bright lamp with you and enter the room. This bright lamp is going to aid you in developing a photographic memory.
Grab a paper and cut a rectangular hole. This hole must be the size of the paragraph or text that you want to memorize. For that you will have to fold the paper into two halves and then cut a rectangle half the size of the text.
Now put that particular hole on the top of the text so you can only read the text which you want to memorize. Make sure that the lamp is shining brightly right next to this text.
Close your eyes and open them again. Keep doing this until your eyes have managed to adjust with the light settings and they can easily focus on the writing once you open them.
Now it’s time for you to start the process. Shut the light off and you will experience an afterglow as your eyes will try to adjust to the dark.
Split the light on again and then switch it back off.
Whatever material was in front of you, notice how it is imprinting in your mind. Keep remembering that imprint and as soon as it is fading, switch the light on again and then switch it back off. Make sure you are starting at the material during the time the light is on.
Keep repeating this process until you recall every single paragraph in order. You will be able to see a picture of the paragraph in your mind and you can easily write it down or say it out loud.