Honestly, and sadly, MS Word. I have a template for startup ideas that is many questions long. It is still easiest to fire up that document and go, where ever

Honestly, and sadly, MS Word. I have a template for startup ideas that is many questions long. It is still easiest to fire up that document and go, where everything is set up with well-laid formatting and bullet points. I am probably biased from many years spent in word processing programs coming from a writing heavy non-technical background originally, but that template gets everything out of the way for me so I can just write. Maybe eventually I'll write a Rails app for myself but I don't think I'd gain much over the current process except version control. Nothing else works as well locally, which is a lot of the problem. Gmail is getting closer to being able to serve purpose as a general idea store for me, but I am not always online, and the migration cost at this point is not worth switching for, even if Gmail worked flawlessly offline.