Cliches in Writing

[Zaeylia]

All decisions from all characters being completely rationally motivated. This started as a mechanism to avoid the ''good/evil'' cliche by elaborating antagonist's motives. Became over-used.
Decisions don't need to be motivated by reason, events don't need to have origin. Give room to errors of judgement.

different levels of dimension

This is the harder method.
Wow you've been digging.

[Rhodevus]

A trope I see too often which I hate beyond reckoning: If the entire plot can be solved by a 15 second discussion, then the story is just bad writing*

*this does not apply to comedies which often rely on miscommunication for comedic purposes. If a drama for instance can end with a happy ending if the two MCs just talked for a tiny moment, that isn't a drama, that is a poorly written comedy. (even worse with cheesy romances which always have the 3rd act miscommunication/break-up)

[Free Stalliongrad]

In those adventure novels, if the protagonist travels together with an orphaned boy, in the end it will always be discovered that in the end the protagonist was the father / mother of the boy and that he abandoned him for his own good.