Read through the entire selection that you would like to memorize, going over it several times in its entirety. If possible, read it aloud. This will enable you to see the big picture. You should do this periodically throughout the memorization process.
Break the information that you need to memorize into small, achievable portions. If you are memorizing a poem, break it down into stanzas. Lines for a play could be broken down by conversation or by scene, depending on the amount of lines of your character. If you are working on a list of facts, work on 3 to 4 at a time.
Purchase a set of spiral-bound index cards. Either 3 by 5 or 4 by 6 cards should work, depending on the amount of material that you are memorizing. Write out your memory work by passages on each card.
Decide on a rate at which you need to memorize the information on each card based on when you need to have the entire selection committed to memory. Carry the cards with you and study them as you go throughout your day. Prop them up and study them as you accomplish daily, routine tasks. Use every spare minute wisely. Be sure to review past cards before beginning a new one.
Choose memory aids to help jog your memory, especially for difficult parts of your memory work. You may find it helpful to picture in your mind what is happening. Or perhaps it would be more helpful for you to take the beginning letter of each word and create a sentence to help you remember each word.
Recite what you have committed to memory. Begin by reciting the selection out loud to yourself. Find a friend or family member who would be willing to listen to you and recite your selection to that individual. This will enable you to determine if any portion needs extra work and review.