A world in which Pokemon-esque creatures roam, but rather than animals, they all represent elements on the periodic table.
A society in which knee-jerk reactions are more valued than being reasonable.
Girls where skimpy, impractical armor, but lampshade this. Their armor is like a forcefield and all they need to activate it is a gem of some sort, and they use their near-nudity to distract their opponents, who are predominantly male.
When people “die,” they actually just continue on in a second life much like the first, but where their infancy is now whichever age they died at, and now the focus is on mental rather than physical development.
Write a protagonist who actually will sell out to the evil overlord for the right sum of money — a protagonist who has reasonable living conditions under the big bad, but is mainly fighting for people beneath him, only a few of which he actually interacts with.
The evil overlord is actually quite partial to the idea of being overthrown by a hero, and makes every effort to be overthrown. Unfortunately, the hero is stupid.
Rather than having one mysterious weakness he keeps secret, your villain has about a billion weaknesses, and only one or two strengths that allowed him to become an influential villain in the first place.
On a journey to save the world, your hero learns pretty much nothing. On the other hand, his pet learns everything he was supposed to and saves the world while his owner just derps around.
Using illusion magic, your hero disguises his sword as a rather starchy pair of trousers and manages to sneak weapons into a restricted city that way.
When your hero completes his journey, he uses the political power he gained from his victory over evil to facilitate his own evil and rule the world with an iron fist painted to look like a rubber glove (figuratively or literally).