When I read the article I was thinking there was actually something quite simple missing from it. I found that just measuring the number of productive hours per day was enough to be very helpful in breaking some bad habits, because it made me mindful of how I was spending my time. I was going to suggest the Qbserve tracker for this --- then I saw that that's actually your app! I guess you didn't want to plug it more,…
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[1] (disclosure: advert) https://daringfireball.net/linked/2017/07/02/timing