I used to do large amounts of programming on paper while commuting or waiting somewhere, but in retrospect I threw most results of that away and did in complete

I used to do large amounts of programming on paper while commuting or waiting somewhere, but in retrospect I threw most results of that away and did in completely different manner when I got to computer. (for example, I wrote most of the macros in dfsch's standard library into my notebook in interpreted code, only to rewrite them in C when I started to actually implement that). But even in that case, programming without computer caused actual boost of my productivity. Unfortunately now I don't have much opportunity to do that and you inspire me to try to somehow make time for that again.