? Research a bit about your potential employer. Check their website for their history, their mission, what they deal with? etc. Make notes of everything you discover. It will help you impress the employer.
? Simultaneously, research about their main competitors, suppliers and customers. How does your prospective employer judge against their competitors? Are they on profit or losing ground? Note it down.
? Visit your probable employer's facility and talk with a few of their employees. Ask them if they are happy with their work? What kind of programs are there for training? Are they allowed to give suggestions for the betterment of their company? Again take notes.
? If possible, try to call some of their customers, let them know you are planning to work with their supplier and would like to know their impression about the company.
? Consider all the notes you gathered. According to the information, list 3 things that impress you and 3 things that concern you about the company. Also, make a list of those areas that you discovered where you feel your skills or experience can benefit the company.
? Get as many common interview questions as you can, may be from a book, from internet or any source. Plan your answers to those questions and ask your friend to interview you till you get all your answers smoothly.
If you need question ideas, there are many books that work extremely well in case of answering all your queries. Though it is hard to fault a book for providing what it says it will provide, because it is certainly impossible to fit everything in a single book. A lot of great interview books can supply you the same information and provide other content as well. If you just want interview question ideas, opt for some books and go through it once in order to satisfy your mindset of facing the interview.