I have a 1 inch binder with three dividers. There is plain paper, lined paper and graph paper with a final section with spare paper for each sections. I have 3 regular folders in there and a pouch containing a 6 inch triangle and typically a 0.5 mm mechanical pencil, occasionally 0.7mm but almost always one of these http://www.amazon.com/Pentel-P1035C-Mechanical-Pencil-Metall... . That takes care of most general ideas and architecture diagrams and mockups and such. Tasks go into bugzilla and text/source goes into files in git. I don't find anything but pencil and paper fast enough for certain things, including tablets.