The key is to refocus your studies to address potential areas of weakness. I suggest you revisit the exam objectives and make sure you take the time and expend the effort to improve your understanding of topics, tools and technologies where you fell short on questions on your previous try at the exam. Alas, books on the TICSA are not yet available (we're writing one in my company right now), so that really can't offer you much additional support and information just yet -- but you might want to consider waiting for such materials to be published.
On the other hand, if you have the money to take a TICSA class, several companies plan to start offering such classes in the next month or two. The chance to learn the TICSA materials from a qualified instructor, who can also answer your questions and provide additional explanation and examples where needed, may be just the boost you need to pass the exam on your next try.
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This was first published in February 2002