Can't quite say I agree with water fasting for so long myself - although I've never tried it.
But I can say I totally agree with what you said about positive affirmations! I read Eckhart Toille's books "A New Earth" and "the Power of Now" and I actually just finished "You Can Heal Your Life" by Louise Hay. Have watched a few of the Abraham Hicks videos as well - really insightful. I have been focusing on positive affirmations too and trying to retrain my thoughts and it really does make a difference in your entire life! The law of attractions is completely true.
Everything in our lives begins in the mind.
"The thoughts we choose to think are the tools we use to paint the canvas of our lives."