[sleepyams]

I think this is good advice but also not the only possible path towards completing a PhD in math. I get a lot of fruitful research done while binge-watching television, for instance. The key is that you have to find something that works for you. For some that may be logging hours but I know a lot of people for whom logging hours is a hindrance. There are mathematicians who have to actively hold back from just doing research all the time, and for these types there's no point in logging hours. My point is that if you don't think the work ethic described in this article is agreeable, don't let that dissuade you from pursuing a PhD in math.