I've finally discovered one of my classmates, Boon Hong's blog, on the web. He has written an article recently, on the topic of value system: "What's your value system?".
An extremely well written article, he has pointed out that some of our value systems are wrong. I agree with him strongly, because for the past 5-6 years, I've been asking myself the same question.
I've already done some of the stuff he has pointed out, while for the others, I've in the process of doing it.
Read the article, and consider it.