<p>I think this deserves to be highlighted:
I did double major, but I don’t think it gave me any sort of advantage in the graduate school admissions process. </p>
<p>My litmus test for double majoring: Would you take the same courseload if you didn’t get an extra diploma for it? If not, don’t double. About 20% of MIT students graduate with a double major. I suspect that many others consider it, but don’t pursue it; this isn’t because it’s too hard, it’s because it’s not worth it.</p>