I agree with trying to get as many nominations as possible. Two of the mistakes that my son made as a senior were not applying for more than one nomination source (he only had a presidential nomination) and not applying to more than one service academy (only applied to USNA). Fortunate for him, he was accepted to USNA. Give yourself the best odds and seek as many options as possible. Also, I recommend that you approach your teachers early and often about letters of recommendation. What they write about you may make a difference. Good luck!