...was simple. Be enthusiastic about the company. Come in eager not to get a job, but to work there. This comes across to interviewers very favorably. If they ask you about other interviews, tell them you're most interested in them. Even if you have a mental reservation. :p All the other advice (besides the obvious dress nicely, smile and all that) was useless and some of it actually made me really uptight without reason. So. Work yourself up.