Hi Praveen,
I was interested in your purchase of Brazilian Net. It doesn't meet my usual criteria, and Yahoo Finance doesn't confirm the ratios provided by Forbes. However, something you may not have known, is the world's richest man, Mexico's Carlos Slim, is close to acquiring control of the company. While the upside doesn't look good to me, the downside would appear very limited. I don't know how shareholder friendly, Slim is, but this could well turn out to be a very good long term investment.
In your book, I felt you seem to imply that $2,000 per stock was the most you could lose (assuming that you chose a constant value of $2,000). But, of course, the maximum loss is much higher. IN your book, you give an example of Amazon, it had a maximum investment in excess of $3,700. Had it joined other cyber retailers in zeroland, one would have lost $3,700+. Consider a stock that one bought at an intial price of $10, a year later it was $2.50, and a year later $0.63. IN this case, almost $5,000 would have been invested if one stuck to your system. You mention the possibility of using a stop loss, but you, yourself, don't use one. Have you never had a stock that became a 'deep diver'? If so, did you continue to hold, or did you take a loss, and move on?