Much like the saying about cameras, the best journal system is the one you have with you.
Much like the saying about cameras, the best journal system is the one you have with you.
I use an A5 size notebook by a Japanese vendor, the brand is Stalogy. It has ~185 thin sheets and weighs only ~100g. The paper is quite good, light and sturdy. If you use a fountain pen or ball pen, the marks won't smear the other side of the page. Highlighters can be seen from the back but you won't mistaken the marks for those on this side. Haven't tried watercolor though.
The covers may become a bit wrinkled if they are wet, but inner pages are not much affected by water if you press them flat when drying. I find this out after I spilled some water in my bag. Luckily no electronic gadgets were in it then.
After half a year I stopped doing most things he showed, except for the monthly review. That rocks. And checkboxes. And a few important pages that I keep referring to that can be found through the index. I track days that I took off on the calendar and otherwise never used that for anything.
The main benefits are
1. Writing things down means you are away for a few seconds from the machine full of distractions (made at great expense by powerful companies for the sole purpose of distracting you), and the physical act of writing helps concentration too.
2. Using this method, I actually keep a decent log of what I'm doing. I never did with any digital method, not for more than a couple of days.