I believe my biggest mistake was that I used the MMS rule, and it worked against me. In addition to applying on you own, you should also visit CCS once a week. There are some companies that recruit on campus for summer jobs. In case you do get an interview, you should prepare well enough for it. Read the literature about the company interviewing you and make sure you have a clear understanding of the workings of the firm.
Mock interviews can be very helpful.
You can ask your friends or someone else to interview you. In addition, you should make a list of questions that the interviewer might ask you, and try to formulate clear and concise answers to these questions. Also don't forget to take a shower and dress in proper attire. Therefore, it is imperative that you try to stay calm. Listen carefully to what the interviewer is asking and try to be very specific when answering the questions.