Not discussed in the article: You have to have the support of the people in your life this will impact. For example, the 7-9am timeslot for working, as listed in the article, will impact my family, as that is when I'm getting the kids up and off to school. OK, so I could move it to 5am to 7am, but that would mean I'd need to go to bed earlier, which eliminates important evening time with my wife. Similarly, I could d…
If I do get some spare time that is entirely mine, the absolute last thing I want to do is more work - one needs to relax! Go for a run, watch a movie, do some coding for fun, play a game, or just waste time on youtube or whatever - I don't want to be "hustling" a side project.
I could stay up later after the wife has gone to bed, but that is going to harm me long-term by trading sleep for side-projects that in reality are not going to change my life as much as long-term sleep deprivation is going to change my life. That said I do occasionally from time-to-time stay up late to have a beer and mess around on the computer - I think that is healthy in the long run :)