I found instructions to, and made up, an excel spreadsheet to build sestinas with. It works well. Just plug in the last words in each line of the first stanza and they come up in correct order in the five following stanzas and the envoi. Makes it easier for last word edits. I have yet to write a worth while sestina but I love the form and read of a well written one.         (I even named my daughter Sestina)
If anyone would like a copy of this spread sheet I am glad to e-mail it. Just send me a PM. I have this compatible with excel 97-2003 or excel 2007.

Happy reading and writing,
JC