The most important interview tip is to be prepared. Preparation involves practicing your interviewing skills, knowing about the company, the industry and even as much as you can about the position you are interviewing to get.
It is best if you can practice your interviewing skills via mock interviews, with friends and family and / or with networking partners.
You have to know about the company make sure you set a Google alert to get all the latest news about the company. If it's a small or private company and there is not too much publicly available information make use of the company's own website, press releases and more to find out as much as you can about the company. While studying (yes I said the word studying - consider this a test and if you get the job, you passed) you should also be aware of industry news and events going on or impacting the industry.
When I taught Eco and finance in 2011-2012, I made my students read Michael Lewis' The Big Short as part of the in class discussion / work because I told them if they went on a finance related interview and could not speak to the financial crisis, the mortgage issue and the huge fallout from the breakdown in 2007-2009 that they would never find a job.
For knowing the job you are interviewing for, this could be tough. You might be brought in without knowing too much about the position and all companies have different naming conventions for jobs that can be similar but you just do not know. Go with the job listing, if it exists, but know if you are an interesting candidate, you might be interviewing for multiple positions at the same time. If you know the company and the industry you can get by without knowing everything about the job.
And this will allow you to be able to ask questions and to be ready to ask questions. Do not leave an interview without asking thoughtful and good questions. Do not ask filler questions try to really apply what the interviewer discussed with you to your questions.
What do you think of my advice for interviewing? I am including a link to Michael Lewis' book that I mentioned above - if you are interested in working in financial services, please read it because the information is still timely and can help you make discussion points during interviews. Happy hunting!
Lisa Vento Nielsen