This year found many more students applying Early Action to several schools. As a result, several colleges deferred more students than usual. Being deferred is an admissions decision that, from a student's perspective, isn't really a decision at all. Deferred means "we like you but need a few more months before we decide if we will offer you the opportunity to join our student body." The good news is there is a possibility that the student may be admitted. The bad news is that a student has to wait. If a student has been deferred, there are a few things that can be done to demonstrate continued interest in the college and a desire to attend.
Write a letter/email: Express your continued interest and intent to enroll upon admission. Reiterate why the college is the best fit for you. Update them on any achievements or other pertinent information that has occurred since you applied. This should not be too long. Be respectful of the fact that admissions representatives are still very deep in reading applications. Also remember that they will receive your mid-year report (first semester grades) from your school counselor after semester grades are finalized.
Send any additional materials that could be helpful: an additional letter(s) of recommendation, extra materials that might strengthen your application (research, etc). The key is to give the admissions committee any possible information that can help them make a positive decision.
Be certain you understand the college's deferral policy. If in your deferral letter you are specifically told not to write or send additional materials for consideration, then you shouldn't.