Whether it be to do your job, get your schoolwork done, clean your house, work on your creative passion, etc.
Bonus points if you’re someone without reasonable self-control so saying something like “I can only have a cookie after I do this/while I do this” doesn’t work for you and you’re just going to eat the cookie and not do it.
You don’t.
No really, you don’t, you just force yourself to do it because you know it’s got to be done. I know it sucks but it is what it is, sometimes we have to do shit we don’t want to, but once you start it’s usually not so bad as you thought it’d be and then it gets easier with time especially if you make it part of your routine.
Source: life experience.