How to pass a interview

So what do these people want from you? Does it seem like whatever you say it seems to backfire and you never get hired regardless? Well they said that honesty is the best but that's a huge lie. So what do they want you to really say?
Future goals, such as college- never say that your unsure even though that's the truth. Pick a college and stick to it. When asked a question, answer confidently ( there are no maybes, ifs and sortas). Use direct eye contact and remember to practice your speech at home before you you actually go to your interview, this way when you are asked those questions you aren't nervous. Some common questions are:
*Why do you want to work here?
*Why do you think you should get the job?
*Do you have any questions?