Some stories use a time-skip to go from one point to another where something interesting happens a few years in the future. Write what happens during one of these time-skips.
Write a society in which citizens explicitly reject the notion of science and advanced mathematics in favor of listening to a fortune teller who does all the thinking for them.
Write a character who quite literally never allows herself any downtime, and is always working on something, improving something, or practicing something.
A magic system wherein sound can be made lethal, but can also be repelled by smell.
An extremely narcissistic protagonist writes a book about himself as he goes through his journey. Bonus points for making him likable regardless.
Write a whole journey in which your protagonist only ever does healthy things, and considers whether or not something is healthy before doing it.
E.g. “I could rush in and save that person from certain death, but I might get smoke in my lungs, which could reduce my lifespan by up to a year.” Etc.
Give your protagonist the name “Robert” or “Susan” or something else really common. Then name everyone else something long and drawn-out like “Sinopharamyn” or “Micanahl.” Notice how your protagonist suddenly becomes the odd one out.
A race whose hair grows at the same rate across males and females, and length of hair is a safe indicator of age (said race may be physically immortal if you wish, thus allowing them to be generically pretty no matter how long their hair is).
In an alternate world, physics act in the way that, when an object exerts a force on another object, the object that was acted upon gains twice the force the first object enacted upon it.
In simpler terms, punches hit twice as hard.
Make your hero a professional briber, that is, he makes a living giving people what they want, be it money or material, usually illegal, to benefit his own pursuits.