This is a pretty general purpose article, but I've found it really useful deciding things at work, too. In particular, it is really useful getting a good answer for the question "Hey, team, we've got 30 things we could work on. What's the most important?".
erh! I just had a flashback to a well know uk coop I was a member of we sent an entire after noon disusing which STV method to use :-)
Citrine or Roberts are much better in practice for taking democratic decisions.