Experts on the Bible: Judges 19:21

Consider of it, take advice, and speak your minds. We have here the three great rules by which those that sit in council ought to go in every arduous affair. (1.)* Let every man retire into himself, and weigh the matter impartially and fully in his own thoughts, and seriously and calmly consider it, without prejudice on either side, before he speaks upon it. (2.)** Let them freely talk it over, and every man take advice of his friend, know his opinion and his reasons, and weigh them. (3.)*** Then let every man speak his mind, and give his vote according to his conscience. In the multitude of such counselors there is safety. - Matthew Henry Commentary on Judges 19.  

*Prayer.
** Using rules of order, and a talking stick could help this step. 
***Voting by ballot or rules of order.