it depends on the fic and how i get the idea for it! for my 2mn, arirang and hyvnchn i just went through my playlist to get a lyric that fit them, for my hyvnho it was also a song lyric but because it was in a scene and music was an important theme, for chnsvng puzzle pieces were an important theme that appeared throughout the fic multiple time too (and piece of a puzzle is bow's favourite sk!z song so that also helped. for bnchn it was just the name of the thread that inspired the fic and for jngchnlx it was a french expression that i thought was very fitting for the fic so i literally translated it for the title!

SO BASICALLY. song lyrics or something based or a theme that comes up throughout the fic :3