Is your song made to express the happiness you feel when you hold your new born in your arms? Or is it written to get three thousand people in an arena head thrashing uncontrollably?
These early decisions will make your future decisions down stream much easier.
If you are stuck on a track, have you asked your self the question what is it for?
As a side note, the crown jewel for unhelpfully vague what-is-it-for is “I want to write the best track ever”.
You will never finish that track.