Re: preparing for an interview
Few pointers: relax, be yourself. Think of it as a conversation with a friend. Be comfortable with the past experiences you have and ready to talk about what was exciting of each. You want to be interested in the position. If there are things that you are not interested in, then keep looking - I bet you won't get a job that you are not all that excited about.
Read the job description and find stories of when you did something similiar in the past. This helps you prepare for the unexpected. If there is something in the description that you have not directly done, you can display the skills that you do have that are related, through the story that you tell.
Usually the interview starts off with an explanation of what they are looking for. It can be very conversational if you keep to your stories you prepared - while still feeling natural of a conversation.
It can help to find a friend or family member that works at the company already to get an idea what they are looking for in a candidate. For example, is there an emphasis on confidentiality and so on.