Do click on the link here (above in red) to follow the directions for the Kriya. You may also go to http://www.ishafoundation.org to see Sadhguru (the Yogi who developed Isha and shares it freely with all) explain via Youtube.
Many people have read or heard about the benefits of meditation that have been scientifically proven to be beneficial. The instructions for meditation practices seem very simple but due to our priorities and how we are living it becomes the most difficult thing for many people. So after some time they leave it alone and maybe come back to it again and again without satisfaction. However, the Isha kriya, which is like a pranayama, chant, and more , prepares one to be able to be free to sit for some time in a meditative manner. This is only the very beginning, it clears, purifies and prepares one to be receptive to subtle vibrations. I invite all to just find a good time to do this practice. Pick perhaps a time when there are little distractions such as early morning before the family rises or before your ritual to prepare for your work or school. Be kind to yourself don’t try to commit to more than is easy, say practice every other day- three times a week. Until you become accustomed to doing the kriya and made a way for the time to be comfortable. I personally like early morning because the benefits are continually revealed throughout the day ahead and also nothing but me gets in the way. Do feel free to share your experiences, and concerns here. Once we embark on experiences like the kriya we understand the difference of how much more valuable self-awareness through experience is over mental & intellectual ideas, we learn best from reality.