[Ronsenshi]

I sketch design elements/components, sometimes structures, various lists very rarely pseudocode. I prefer to write down ideas which have to be realized, instead of jumping straight to realization (pseudocode).

I don't have boxes of notebooks, but I do have couple of small shelves filled with years of notebooks. From time to time I like to go through that stuff - it's actually very interesting to see your though process from years ago. Besides notebooks I have small binder filled with hundreds of post it notes for projects which I store.

Overall I vastly prefer handwritten notes for projects than some kind of digital notes. It's easy to open page for the recent feature, easy to see what you have in mind, how something should be done or what should be considered. ON the same page I could have multiple "data structures": reminders, lists, summaries and descriptions which easily show state of the progress for project/feature.

I very much like Moleskin-type notepads with dot-grids with around 100 pages. I have 2 notepads - one for work and one for personal projects.