I'd wager most people here who don't get enough sleep aren't doing so out of some sort of grindset mentality, but because they simply cannot. I find it very hard to fall asleep, nearly impossible to sleep in (a consequence of getting older?), and more interrupted sleep. I'm reticent to try drugs to enable sleep because I've heard that the sleep they provide is not true sleep.
Physical labor. Or exercise. If you push yourself to the point where you're physically tired, you'll sleep like a rock. If it doesn't, you're either not pushing hard enough or you ought to see a doctor.
I can still feel the adrenaline and elevated heart rate and body temperature that just makes it even more difficult to fall asleep so I have no idea how people who go to the gym at 9PM manage to fall asleep. I wish I knew their secret or had their genetics.
Lighter exercises that don't stress the body, like long walks and yoga are much better for sleeping but not good for building muscle.
My problem isn't falling asleep, it's staying asleep for long enough to feel rested. I usually wake up after 4-5h and can't easily fall back to sleep. By the time I get sleepy again(7-8AM) it's already morning and time to get up for work.
So far I haven't found a (natural) cure for this. There's medication that aids with getting long sleep but the side effects (drowsy ness and brain fog) are nearly just as bad as the lack of sleep.