Here are a few basic tips when creating your own families. Can be good to ensure consistancy among families as well as reduce the chance the family will 'break' when you flex it.
http://whatrevitwants.blogspot.com/2011/08/family-creation-groundrules.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+WhatRevitWants+%28What+Revit+Wants%29&utm_content=Google+Feedfetcher
