I wish there was a way to always produce a notebook, without the hassle of getting it out of the backpack without having to carry it (uses 1 out of 2 hands). Same for the pen. I think finding a surface can also be difficult. Anyone has ideas?
If you want to be a bit more upscale you can get pocket-sized notebooks with a loop to hold a small pen.
[1] https://fieldnotesbrand.com/products/original-kraft [2] https://www.jetpens.com/Pilot-FriXion-Ball-Slim-Gel-Pen-0.38...
[1] https://www.cultpens.com/c/q/brands/clairefontaine/europa-by...