Writing my own fate wasn't something that came with a blueprint; I had to figure it out through brutal trial and error. The biggest thing I learned? Stop treating a story's progression like a railroad track you're forced to ride. It's more like a garden you're planting, where the seeds you choose to nurture actually determine what grows.
A lot of new writers get stuck because they think 'destiny' means an epic, world-ending prophecy from page one. That's exhausting to maintain. My breakthrough came from making the protagonist's destiny something deeply personal and maybe even a little small. Like, a baker's 'destiny' might be to create a recipe that becomes a town's secret treasure, passed down for generations. The stakes feel huge to them, which makes the reader invest.
I keep a file of 'fateful moments'—tiny decisions that could fork a character's path. A missed bus, choosing to trust the wrong person, picking up a strange object. The key is showing the weight of these moments after they happen, not with ominous foreshadowing beforehand. Let the readers piece together how destiny was woven from those threads.
It's messy. Sometimes the most effective destiny is one the character fights against so hard they accidentally fulfill it, or one they misinterpret completely. The satisfaction isn't in the grand reveal, but in the quiet realization that all the pieces were there, clicking into place with a terrible, beautiful logic.