Could we have a FAQ or wiki on how to best embed a schematic?
The discussion on this question: How Arduino Power supply works shows that the process can be confusing, particularity to newcomers.
Having good, readable schematics to accompany questions seems like such a big benefit that it would be in everyone's benefit to explain to people how to do it in the best way.
EDIT: Based upon Kellenjb's comment, I would like to broaden my question. I was not really asking if a schematic should be in color or B&W, rather I am asking for general guidance on a simple and easy way for a newcomer to create a simple schematic and attach it to a question.
My thought is any schematic is better than trying to describe a circuit in just words, and further I think (I could be wrong) that many newcomers don't really know how to create and attach one with their question.