Do as I say, not as I do
I'm am/was up a bit too late due to friends and need to wake up early tomorrow.
(Obviously completely against my will)
Either be willing to take the consequences into account or avoid this kind of situation altogether.
Although I might be able to function extremely well even on low sleep, due to a few years of bad sleep management, this is not a skill that should be trained.
The gains do not outweigh the risks. Always prioritize at least 8 hours of sleep. If you miss a day, make sure you sleep longer on the following one.