Do you use affirmations?

Many people use affirmations to manifest the things they want in life. Some also claim miraculous life changes through affirmations. It is the subject of many books, going back as far as What a Man Thinketh, The Power of the Subconscious Mind, Think and Grow Rich and most recently The Secret. I'm currently reading Louise Hay's You Can Heal Your Life. I love it. I have tried affirmations and twice it has worked for me but not every time. Have you tried affirmations? Have the use of affirmations been beneficial in your life. Please share your experiences with affirmations and list which books that have helped you the most.

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