So spend life working, building stuff outside of work and then writing about it while I'm asleep?
I also play tabletop and board games, watch TV with my wife each night, and even play Mario kart with my kids. There's plenty of time.
That said, my advice was primarily targeting recent graduates or young developers who are looking for a job. That implies they have plenty of time and are trying to put the bulk of it towards finding a job. If I were in that position, I'd treat building my resume and finding a job _as_ my full time job.
I've got two young kids (youngest 4 months) and I spend pretty much all my free time either playing with them, cooking, cleaning and life admin. I've only recently started carving out time again to do plural sight courses etc at home. And to do that I'm having to reduce time lifting weights in the garage (which was only about 1.5 hours a week). In fact I should be doing a plural site course right now!