I keep a notebook that lets me (hopefully) reestablish context when given a date. This means I use it for scribble, planning, reipminders, summaries and code c

I keep a notebook that lets me (hopefully) reestablish context when given a date. This means I use it for scribble, planning, reipminders, summaries and code changes. All in one place and on paper in a very nice engineering spiral notebook as I have never found anything digital that is as flexible and robust as pen and paper. When I had to do summaries of my time, I just looked over the last week. And it sits at my right hand all the time.