Perform acts counter to what your body wants for the majority of your earthly existence. Feel bad bout wanting rest and relaxation. Develop anxiety about not having enough money.
Go to sleep earlier, you probably are really just still exhausted from lack of sleep. Once you have eniugh sleep you'll wake up without falling asleep again.
Conventional wisdom is to keep a balanced circadian rhythm. Sleep at regularish times. Your body clock is set by when you first see blue light from above, so going outside first thing and looking up. Meal times too. Consider your diet and pre sleep habits - sugar, tv, caffeine tend to mess with sleep. Alcohol disables your adrenaline and helps fall asleep but then lowers the quality. Weed largely removes dreams and helps feel rested, but then there's a slight hangover that encourages you to keep smoking
In short, it's a holistic lifestyle thing. Everyone is different, so keeping a journal and experimenting helps. And of course your daily level of stress is a factor