I keep some paper notes especially when sketching out visual UI aspects before trying to implement them. But I keep extremely detailed text files for each ticke

I keep some paper notes especially when sketching out visual UI aspects before trying to implement them. But I keep extremely detailed text files for each ticket as I'm working on it as well. It helps my pick up right where I left off and to find something that was thorny if I need to work with it again a few months later.