Interesting discussion about work journaling on Hacker News: https://news.ycombinator.com/item?id=40950584 & https://fev.al/posts/work-journal/
Use a work journal | Hacker News

I've been somewhat doing this in the form of writing daily notes for a year or two by now. Helps keep focus and I can easily recall what I was doing the previous days. The writing app I've been making has a feature to instantly save the document as timestamp + first line of file as title into a specific folder. I rarely look at the older than week files, but sometimes they're handy to have.

@joonikko I keep daily work notes as well: journaling type things for what I've been working on, meeting notes for meetings I take part in and the type of work journal Tanner Christensen talks about here: https://www.tannerchristensen.com/notes/using-a-work-journal-to-create-design-case-studies

I recently read a similar article by Sam Bleckely on what he calls Lab Notebooks: https://sambleckley.com/writing/lab-notebooks.html

I find it so useful to be able to reference back to what was discussed/agreed in meetings, how I solved problems and in general what I've achieved at work.

Using a work journal to create design case studies - Tanner Christensen's notes

Keeping a work journal is one of the best things you can do for personal development. A diary of work is also an excellent way for designers to build a case study for their portfolio.

@joonikko I like how Sam puts it:

"A lab notebook makes it safe to stop work at any time."

Being able to keep track of progress and thoughts while working helps enormously when having to context switch.