The Washington Post just unveiled an excellent guide to voting procedures in all 50 states.

Just select your state, then answer whether you are registered to vote and how you plan to vote (by mail or in person). Here, for example, is what happens when you select voting by mail in North Carolina.

Scrolling down the page reveals these instructions.

You can scroll back to the top at any time to change your state or voting type.

Cool, huh?