Just do it. You NEED to do it.
If you don't, I better not hear a peep out of you for the next 4 years about ANYTHING.
And if you are a woman and you didn't vote....well, there are no words. Did you know that women couldn't vote the year that my Grandmother, who is 90, was born? We didn't have that right until 1920. Read more about the history of women's suffrage here.
And go vote. Seriously.