If you answered, "Yes," to question 1, and, "No," to question 2 then go out and vote today. Unless you're too young to vote or something.
If you can vote in the US, and you have not yet. Vote. For the love of whatever it is you love, vote.
If it is within your ability to help others vote (it's not within mine, certain things involving interactions with others, especially strangers, are simply outside of my range of possibility) then help them vote.
Completely serious here, this is important, vote.
[The edit was because what I originally said sort of... completely ignored every US citizen living overseas.]