Every day for a large portion of the day. I use an org-capture template which lets me capture tasks and I keep all my notes in those tasks including proof-of-concept code, etc. I capture and schedule meetings through the same template which pre-populates things like space for a list of attendees, the agenda, after-meeting notes, and action items which become todos. I even track the amount of time I spend on each so I can fill out my timesheet as I'm in a field where we maintain billable work, etc.

All this to say it's a very flexible system and lends itself well to keeping notes.

This sounds very similar to how I use org-mode these days; lots of capturing (from e-mails, code, web pages, chats, anywhere), clocking and note-taking, maybe some quick calculations or sql's using babel, timesheets for end of month billing, agenda/calendar views and reminders …

But when I was in university, I used it mainly for note-taking on lectures, reading lists, ideas, and for writing articles and such (exporting to LaTeX). Considering the amount of things I've found it useful for, learning it has certainly paid off :-)

Oh that’s great, I would love to know as someone who has no exposure to emacs how can i get started

Yes, I have a little template that I update every day with what I've worked upon.

There's a simplified version available here, with two shortcuts `M-x new-day` to create a new (templated) entry, and `M-x today` to jump to today's entry:

https://github.com/skx/org-worklog

What I use is a little more complex than that, but this might be a good starting point for the curious.

I’ll definitely check this out

Yes

all the time