Having spent a lot of time recently applying for jobs, one thing I will say is to take advantage of any opportunity provided by your university to do practice interviews. I found the feedback from these to be hugely helpful, particularly in introducing me to the STAR (situation, task, action, result) technique of structuring answers and then in evaluating how well I was actually applying STAR in situ. Ultimately this helped me build up an arsenal of well-structured examples which I could apply to a range of standard interview questions.
Good luck!