The League of Women Voters publishes voter’s bills of rights. Often they will be posted at polling places. Ten of these, including Florida and Ohio, can be found here.
While identification and other requirements vary by state, here are some of the most important rights to know: You are allowed to vote if you at least line up before the polls close. You can ask for another ballot if you spoil yours. You can ask for help or an explanation if you need it. And thanks to the Help America Vote Act, you can ask for and fill out a provisional ballot if your registration is challenged for any reason.