> I also stopped caring about my total productivity per day for the same reason.

I'm not sure how much it'll be worth, but I stopped worrying about any productivity of any particular day. Instead, I choose to write tools that are placed strategically: server config distribution system, data bus, data storage system, command issuing tool, things like that. I make my colleagues' lives easier (or so I like to think).

Though I'm in a somewhat privileged position, being a half-sysadmin and evading the most repeatable and/or customer-facing work.