This. Part of the adjustment is working in pockets of time rather than decent stretches with time to get into "the zone". I did well during the young kids era by keeping a text file of exactly what I wanted to do next. At the time I was using a paren-prefix language (Scheme) that made it easy to come back to half-finished code and see where I was going with it. In other languages you might want to write a bunch of one-line comments describing what the code is going to do, then fill in the code under the comments.