I'm using draw.io to draw mockups, it's incredibly useful, it helps me to figure out how the interface looks like. Also I use emacs org-mode to write down my n

I'm using draw.io to draw mockups, it's incredibly useful, it helps me to figure out how the interface looks like. Also I use emacs org-mode to write down my notes. Usually it's just some thoughts on the project and list of features that I want. Then I start putting it together in browser, usually almost immediately, without much preparation. I just create a django project, add a test view, and start writing some html/css. It really helps me to think, as I do that I get all sorts of ideas about the design, features that I want, and how the whole project will be structured. Meanwhile, on my notes, I have a list of "big", "medium", and "small" features, ranked by importance(or in order I want to build them in). Also bugs, questions, and whatever other ideas I have. But all that is just for personal projects, I haven't yet worked in teams on anything big.