Big interview mistakes are obvious—being late, dressing inappropriately, bad language, and so on. There are plenty of more subtle mistakes that can also keep you from getting the offer. Make sure you aren’t making any of these: Mistake #1 – Failing To Research The Company: Researching the company goes beyond a quick Google search to find out what they do. Dig in a little deeper to find information that will help you better answer interview questions and come up with better questions to ask. Never ask something you could have easily found online. Read more.