Between a sluggish painting speed and the occasional hiatus I’ve occasionally found myself at a loss when trying to remember how I painted older models. I can usually remember the technique I used but don’t always recall specifics like paint mixing ratios. Late last year I finally decided it might be a good time to start keeping a basic painting journal. There’s a number of electronic options out there, from Google Docs to a wiki (either personal hosted wiki or on a stick). At some point I’ll probably transfer most of my notes over to some sort of taggable or sortable format but for now I’ve found it most convenient to keep a small notebook and pen next to my painting area so I can jot down notes or paint recipes as needed.
