The main example I can think of is realizing "hm, the amount of time I spend on X is very different from normal." For example, in Nick Winter's recent book he mentions that after he started timing his showers, he was able to take them in less than 2 minutes. I had no reference point for that- I wasn't even sure how long my showers took- and it happened that I normally spent about 20 minutes in the shower, and fairly quickly was able to get it down to 5 minutes. I don't think that's a particularly compelling example, though, and don't expect that I would personally use this repository. (I stopped timing my showers and trying to make them shorter when I realized they were a major source of physical pleasure in my life, and making them shorter and more stressful was a terrible idea for me. Someone who doesn't enjoy taking a shower as much would probably gain from applying that time to something else.)