There is a wealth of information out there on tuning a cigar box guitar. I will continue to research resources and publish them here, but below is a good start.
- Cigar Box Nation: They spell out a variety of 1- to 6-string open tuning. They also have links to videos.
- Bluesboy JAG: Has easy-to-view graphics showing 3- and 4-string options.
- Cigar Box 101: This is a self-proclaimed “Ultimate Beginner’s Site.” Might be a good place for a novice to check out tuning as well as common chords.