An answer I noticed was a long rambling story of the responder's experience with the question and what they did about it. More an essay than an answer. Though it did answer the question (in several ways), it was a long wall of text and was heavily downvoted.
I couldn't find a good reference to give advice on how to make a good answer. There is plenty of advice on making good questions, but the only advice on answers I could find was: "How do I write a good answer?" the from Help section. Unfortunately it is not good enough; regarding the length of the answer it says: "Brevity is acceptable, but fuller explanations are better." which is of course completely wrong in this case.
Is there a good tutorial on making answers for the StackExchange network somewhere?