Tips For Standing Out During the Interview Process
blog.meebo.com
blog.meebo.com
All this reflects back on yourself and will get you in 80% of the time. The other 20% requires you to answer puzzles, programming problems etc.
I've taken people who can't get to the exact optimized solution I'm looking for but who dint give up easily and whi keep trying till they start to irritate me to no end by nit letting me move onto the next question.