I went to a weekend concert of Sweet Honey in the Rock, who worked a number of pro-voting messages into their a cappella harmonies. Their advice: take your camera to the polls.

Given all the hoopla about voter suppression and voter fraud, as well as the new concerns about electronic voting systems, I think the advice is sound. Go with the assumption that you won't need it, but turn it on as you walk in the door. If something untoward happens, take a picture of it--a bad ballot, an intrusive political volunteer, a lengthy line--whatever prevents you from voting accurately and freely. If you have a digital camera with video capacities, capture it on video.

I don't want to encourage anyone to go to the poles looking for a fight. Go with an assumption that all shall be well. But also learn from the past and be prepared.

And, in case it's helpful, here's what the constitution says about voting:

+From Amendment XIV, section 2:...But when the right to vote at any election for the choice of electors for President and Vice President of the United States, Representatives in Congress, the executive and judicial officers of a state, or the members of the legislature thereof, is denied to any of the male inhabitants of such state, being twenty-one years of age, and citizens of the United States, or in any way abridged, except for participation in rebellion, or other crime, the basis of representation therein shall be reduced in the proportion which the number of such male citizens shall bear to the whole number of male citizens twenty-one years of age in such state.

+Amendment XV
Section 1. The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude.
Section 2. The Congress shall have power to enforce this article by appropriate legislation.

+Amendment XIX
Section 1. The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of sex.
Section 2. Congress shall have power to enforce this article by appropriate legislation.

+Amendment XXIV
Section 1. The right of citizens of the United States to vote in any primary or other election for President or Vice President, for electors for President or Vice President, or for Senator or Representative in Congress, shall not be denied or abridged by the United States or any state by reason of failure to pay any poll tax or other tax.
Section 2. The Congress shall have power to enforce this article by appropriate legislation.

+Amendment XXVI
Section 1. The right of citizens of the United States, who are 18 years of age or older, to vote, shall not be denied or abridged by the United States or any state on account of age.
Section 2. The Congress shall have the power to enforce this article by appropriate legislation.

There is other language about elections, but not about voting as such.

Also check out this Department of Justice introduction to the Voting Rights Act.

http://www.usdoj.gov/crt/voting/intro/intro.htm

Vote!