The secret to interview preparation turns out to be good preparation. It seems amazing given how much time people spend at work but only 1 in 10 people spend more than 2 hours preparing for a job interview. This can be used to your advantage. If you spend just 2 hours (one evening) preparing properly for a job interview it will give you a huge advantage.
This infographic from Acuity Training will show you the five key ways to prepare for an interview and also the one key thing that you must do afterwards.