Candidates need to remember to sell themselves at all times. With very little research, candidates can find out the sort of questions that are likely to be asked during an interview at a given firm. Some candidates are just naturally good at interviews but the majority of successful candidates are the ones that have prepared for them properly. When asked to describe a challenging situation that you might have faced it is always important to remember that the interviewer isnt particularly interested in what the situation was, but the skills and attributes that you were able to demonstrate that got you through it. The key competencies that law firms are looking for are well known. Think about these in the context of what you have done and have a good range of examples ready to demonstrate them.