Here’s what I found: if you’re in need to monitor your productivity and implement productivity hacks, then you’re not working on something really meaningful to you.
Doing my taxes or filing my invoices every end of month is also not very meaningful to me and I usually delay it to the point of almost getting fined.
Not 100% of the work has to be meaningful.
True. But often, you have to work on things you don’t necessarily enjoy to survive/succeed. Eg. Marketing for indie developers who likes to code and like independence.