This has turned into a great thread with ideas on how to track ideas. Some of them seem so obvious as I read them, but I had never thought of them before. Like having a G doc with my ideas in it. That way I can add to it via phone, at work, or at home (in my future hot tub).That's what I should do instead of relying on my memory. I have set up a Google doc for DnD ideas that I often add ideas for feats, subclasses, etc. I should do another for my campaign.
DUH. Going to go create that thing right now.