When I have an idea, no matter how developed, I throw it into the ideas pane.
This creates a physical scrapboard for organizing my thoughts. I work on ideas
over time, and, when one of them becomes developed or good enough, I'll
publish it and it'll move over into the published column.
This is so important. I’ve been using SimpleNote to the same effect. I just handle the publishing part separately; I publish so rarely that it doesn’t make sense for me to couple the two together.