I currently log the total number of hours I work each day in an OpenOffice Spreadsheet. I input the start time, lunch/break time, and end time, and it calculates the total hours worked. I'm not savvy enough to create this type of spreadsheet myself, so I looked through a large number of templates online before finding one that works as I've described above. I'm still not crazy about the way that this spreadsheet is laid out.
If you can link to a spreadsheet available for download similar to the one described above, please do so in the comments.
If you use time-logging for various distinct projects throughout the day, please describe this process and link to the software you use (if possible).
More of a meta-discussion: how time-logging this enhanced your performance or time management?, for what types of projects/activities is it best to time-log?, general comments about the idea
I track my time using RescueTime. The value to me is improving my calibration with respect to how well I feel I'm working, as compared to my actual RescueTime hours. Sometimes I think "Wow, I really worked a lot today" when in fact I didn't get many hours in, and I'd rather have my intuition match the metrics. I don't have a special justification/goal beyond that but I'm hoping something useful pops out.
I suspect that this is an instance of low cost, low median outcomes, but with high upside -- it's unlikely you'll find something that makes a difference, but the cost isn't very high, and there's always a chance that, without putting numbers on it, you are missing some productivity intervention which would make a big difference to you. For example, perhaps you think poorly when you're sleep deprived, but you don't know it, but tracking productivity would let you know that's happening.
At the NY Quantified Self meetup a few weeks ago, somebody reported tracking her post-concussion symptoms and discovered that, in fact, she wasn't suffering from a concussion at all -- it was a very different condition which required separate treatment.
Ah, I see. That clarifies things significantly. It also further indicates my erratic context switching is non-ordinary and requires special needs on this front.