when i see the words 'challenge' and 'meditation' being used in the same sentence, an alarm goes of in my head.
i'm too tired to go into details right now, but if you're interested in where i'm coming from, or in meditation in general, i highly recommend giving this book a read:
Clark Strand cuts right to the heart of meditation, without dogma, gurus, religion, beliefs, or any of the other gunk that gets in the way of sincere and honest practice. In a beautiful style reminiscent of Thich Nhat Hanh, Strand has created the ideal meditation companion and guide. While Strand is probably among the few teachers who would never invite a following, he most certainly deserves one. If you read no other book on meditation, read this one. If you have other books on meditation, put them on the back shelf and read this one. If you have never meditated before and want a book to teach you how, read this one. This is the only meditation guide you will ever need. It is superb!
http://www.amazon.com/Meditation-Without-Gurus-Clark-Strand/...
the first review sums things up nicely:
Clark Strand cuts right to the heart of meditation, without dogma, gurus, religion, beliefs, or any of the other gunk that gets in the way of sincere and honest practice. In a beautiful style reminiscent of Thich Nhat Hanh, Strand has created the ideal meditation companion and guide. While Strand is probably among the few teachers who would never invite a following, he most certainly deserves one. If you read no other book on meditation, read this one. If you have other books on meditation, put them on the back shelf and read this one. If you have never meditated before and want a book to teach you how, read this one. This is the only meditation guide you will ever need. It is superb!