I would definitely come up with an example of you working well in a group. Also, come up with a time when you managed your stress well or showed patience. Those are both important qualities to have at this job. The interview questions were very similar to the ones you would have filled out for the online application, so keep the answers you made for those in mind! I think the interview lasted less than half an hour (or maybe about that), so don't stress about it too much. As a general counselor, you will be working with other people for many, many hours of the day and you need to be able to communicate well.