In my bag I carry a sketchbook, 4 X 5 cards and loose leaf arches and rives printmaker's paper. I keep watercolors available but have not used them as much as I used to. I mostly use a Uniball micro pen or Sakura Microns for my drawing. Recently I rediscovered an old Senator fountain pen which has a nice feel. The feel is what it's all about. Whatever feels good in my hand will give me the best opportunity to express myself fully in the moment.