Let me explain!
Worldbuilding can come after storytelling (and I know some who recommend writing a story before building its world) and even transmedia can come before all the rest (in fact, there are good arguments as to why you should "begin with the end in mind.")
As such, worldbuilding necessarily comes first. This is a bold statement, I know—that some, especially those with a great deal of practical experience and inclination, are apt to decry as false. (I don't mean to disagree with any practically minded approach that emphasizes getting things done--by no means!) What I am saying, however, is not that you have to compile huge, leather-bound tomes of encyclopedic information on a given storyworld, but that the action of generating such a world is primary at an almost existential level.
Worldbuilding is the development of all that is. As such, you face a steep and unyielding obstacle in the unfettered journey of your creative storytelling imagination: it simply is impossible to actually develop a whole world (and every minute detail of which it consists).
However, this axiom (worthy of an article all its own), no matter how much of a wet blanket it may feel like, is tempered by just how essential some amount of worldbuilding actually is.
Nobody really supposes that you write in such a way as to leave characters to gyrate in a blank vacuum. No—it is a myriad of unspoken, and perhaps unchallenged, assumptions about how life—in this world, in any world, or in fantasy/imaginary worlds generally—takes place.
Every facet of your world will impinge upon and inform the story. Now, I know the downside of this realization can be a paralyzing need to discover and create copious, perhaps excessive, amounts of setting information, before you can feel grounded enough to begin—but conversely, the detail that you have built in your world will inform your assumptions while writing.
And the more you challenge assumptions—the more your writing will be liberated and free to present though-provoking and original twists on old ideas—the essence of breaking free from cliché.