Very careful time tracking is valuable on many levels.
Recently I shifted from "how is the quality of how I'm spending my time?" style tracking (EX: categorize into "excellent", "good", etc) into "what activities am I spending my time on?"
It's always amazing and surprising to see how little time working is required to do a task, but often the time spent "at work" is much higher than that.
For instance, I finished an absolute beast of a bear of a task in 7.2 hours (425 minutes) of full-on work across two days. It seemed like the kind of thing that would take a long time, but it was only one full day of working.
But I notice if I'm not careful, I'll spend maybe 2-3 hours in a day doing the most important types of working and then spend a lot of time "at work" -- sometimes doing very valuable things, but by definition, almost never as valuable as the most valuable thing.
Double check this from time to time. How much time is going into working vs. being at work. It might stagger you to see how quickly things get done when working.