Also by Sai Emrys (<a href="http://saizai.com/" rel="nofollow">http://saizai.com/</a>):<p>Meditation for Hackers: All-point techniques (<a href="http://s3.amazonaws.com/saizai-public/Sai%20Emrys%20-%20Meditation%20for%20hackers%20-%20all-point%20techniques.pdf" rel="nofollow">http://s3.amazonaws.com/saizai-public/Sai%20Emrys%20-%20Medi...</a>)