I'm using gtimelog for this. Similarly, I don't need a minute-precise account of my time, but it helps to get a rough overview where my time is going - system m

I'm using gtimelog for this. Similarly, I don't need a minute-precise account of my time, but it helps to get a rough overview where my time is going - system maintenance, incidents, project work, organization - or what time certain infamous internal projects really consume using the tags.