Use your favorite masturbation technique to bring yourself close to orgasm. Just as you're about to climax, stop all activity and let yourself relax for a moment, relishing in the near release. Let yourself settle down to a 5 or 6 (10 being a climax) before starting over again. Do this several times before allowing yourself to actually orgasm. You'll find the resulting orgasm to be extremely strong.

Essentially, you're cycling up to a strong finish. As you let each wave take you, try to come closer and closer to orgasm. Building up sexual energy during these cascades causes an immense release in the final orgasm. Many women report much longer and far stronger orgasms when using this technique.