If you want to always have "content" - either for writing articles, books, courses, promotions, comedy routines, and so on... It's a good idea to keep a notebook...
But are you
revisiting it regularly?
If not, maybe that's what you're missing?
The following are a couple of great articles I read about this recently...
I keep extensive notes on everything. (At the moment, I use Simplenote, because I can use it on my desktop, my laptop, or my smartphone - but it sometimes has problems syncing, which is annoying. I regularly download my notes to back them up - Simplenote just saves them as text files, so it's straightforward... Google Docs is probably more reliable, though...)
However, I need to implement a system like these guys use, to
revisit my notes... This helps you organize them better, so you can "mine" your own notes better, for re-use (and profit) in many ways!
Thankfully, I have years of my notes... I'm pretty sure I have enough material there for several kick-ass books or courses!
Here are the articles. Both these guys are very successful non-fiction authors - so they're giving you a peek into the systems
they use!
The importance of revisiting notebooks by Austin Kleon
https://austinkleon.com/2017/12/15/o...ing-notebooks/
The Notecard System: The Key For Remembering, Organizing And Using Everything You Read by Ryan Holiday
https://ryanholiday.net/the-notecard...hing-you-read/
Best wishes,
Dien