There is no finding the notebook, the right page or looking for a pen. It feels more natural for me to write on devices rather than on paper, especially as I was often using them anyway and it took a moment to pull up the app and just write. Quite early on, like a lot of people with iPhones, iPads and Macs I bought the " Day One" app.
Inevitably, once the habit was formed, it grew and I soon had a personal journal with at least one entry every single day, a nature journal and some more occasional journals for special trips and holidays, to keep note of what was happening in my house and garden and in my main hobbies. It is strictly private and strictly for me, but I now have more than 5,000 journal entries. At the time, I felt like work was taking over and I wanted a way to make sure I attended to other things and also a way of processing what would otherwise be just "one thing after another".
I had systems to keep track of work and projects in my very busy job, which included automatic and manual progress notes and updates, but I found less tangible, but maybe more important things, becoming a blur. I started writing a journal in the 1990s, when I tried, and soon valued, spending a few minutes every evening to jot down what had been important in the day, that I might want to remember.