Isha Kriya is a modified form of the meditation that I learned through Inner Engineering back in May, and for the first time it's available to everybody online. Here's is what Sadhguru has to say about it:
“For different levels of thought and emotion that you go through, your breath takes on different types of patterns. If you are angry you breathe one way, you are peaceful you breathe another way. You are happy, you breathe in another way. You are sad, you will breathe in a completely different way. Have you noticed this? Based on this conversely is the science of Isha Yoga: there are conscious patterns of breath which can leave you in a constant state of bliss and healthfulness.”
To learn more about it, please watch this video.
And if that peaked your interest, please visit this web page which will offer you a chance to try the Isha Kriya on your own.