And even if you don't think your vote will matter in the presidential election, I guarantee you this; it WILL matter in your state legislative elections. And if you're a student, those are the people that largely determine how much funding your education is getting. If you don't like programs being cut, good professors getting fired, or your major being taken away, NOW is the chance to register your displeasure.
And now...a quote from Ghostbusters:
"If we're wrong, we go to jail---peacefully, quietly--we'll enjoy it! But if I'm right, and we can stop this thing...Lenny...you will have saved the lives of millions of registered voters."