Two things I learned from a Thai Buddhist monk we met up with three years ago in Ladakh: First, always carry a cloth for sitting: then you always have a place to sit down, wherever you go. Mine's a little more sophisticated than his - a light microfiber yoga towel from Target, that I can lay out for some yoga practice or fold for sitting.
Second, always carry a shoulder bag to put stuff in. Mine's a cotton messenger bag that I picked up for €10 from a street seller in Rome.
There's a third thing I'm sometimes tempted to implement. It seems that standard equipment for Thai Buddhist monks of his order included a Samson tablet. He used it as computer, phone, camera and e-reader - one device for everything. But I don't think I could get any work done on that!