/sci/ - Science & Math

what is the science behind laziness?

So I just fucked up 4 huge assignments because I'm retarded and left them all to the same weekend.
I didn't forget, I saw it coming for weeks. I just couldn't make myself give a shit, and just jerked off and played games up until Friday night and I was fucked.
So my question is, other than stims, is there any science based methods for developing discipline? Everything I find is either "just like do it bruh" or some pop psychology shit like "tickle your left nut and put a grape in a jar every time a thought of laziness comes by, this will trigger your chakras to open up your hippo pineal lobe to un lazy you".