When I was a working writer, I spent most of my day designing, writing, and editing technical manuals and documents on the computer. I had a second laptop for e-mail and graphics work, and since I also used my journal for meeting notes and project status notes, it was always open so I could keep notes and ideas updated throughout the day. When I wasn't at work, I used a Daytimer binder for my journal, using pages I designed myself. It went with me wherever I went, and I loved the dark green leather.
Since I retired, my writing habits have slowly changed back to handwritten notes, but I regretfully had to shelve that lovely green Daytimer binder. Once I retired, those custom pages weren't possible anymore.
A couple of years ago, I designed a cover that fits over a standard composition notebook. I liked it so much, I made a bunch more, and gave most of them away. The composition books are perfect for my "new" style: I can tuck one into whatever tote or day pack I choose to carry, and I love being able to pull it out and write whenever the mood strikes me.