Let's break down a day, shall we?
You have 24 hours. Eight hours to sleep. Eight hours to work. You are probably spending three hours a day to cook and eat, and another two to commute. One hour top to shower and put on some clothes. You are left with two hours of free time.
One third of your life is spent sleeping, another third is spent working.
Time flies. There is no time to loose doing a job you don't like. It's common advice, but I don't think we correctly weigh the impact staying in a terrible professional situation has on us: "Just another month, just another year, then I'll leave!".
You don't know what self-love is until you learn to respect your own time.
Now, let's imagine I'm a productivity freak and I wonder how many hours I can work per day if I have the right environment without losing my sanity.
I can remove half an hour of sleep by becoming a biphasic sleeper: one core sleep of five to seven hours and a nap of half an hour. If I move to South-East Asia, I remove the need to cook - healthy street food being available everywhere. I just need to spend an hour to grab it and eat. I can listen to a podcast or watch a lecture at the same time. Since I work remotely, I don't need to commute. I add an hour to work out or do some cardio. I don't need to spend time choosing an outfit (minimalist garderobe) and I can have a cold shower in ten minutes.
Consequently, I can find a way to be somehow productive for 16 hours a day. 2 hours spent multi-tasking, but 14 hours that can be dedicated to deep work. If you have a full-time job, that's still 6 hours left to hustle.
Of course, this kind of work day is not sustainable seven days a week. You still need to have room for socializing and spending time with your family. You need time to daydream, relax, and celebrate. All I'm saying is you can always find time to do the things you really want to do. Not having time is merely an excuse.