Aside from what is considered "standard arrangement", a couple of tips I received from successful songwriters:
1. The song should tell a complete story.
2. It should allow simple imagination to establish the meaning, trigger an emotion or relate directly to the experience. Not a lot of thought required by the listener.
3. All segments of the entire song (both lyric and instrument) should tie together in a logical sequence.
Now #3 is kind of vague, so think of a song like one piece of rope with different knots tied along it's length. The knots are different; some big, small, simple, complex and some repeat, but it is still the same piece of rope. i.e- If you start with chain, stay with chain, just tie different knots in it. Don't lose the "tone".
Since I'm more of a guitarist than a vocalist, I used to fall into the trap of forcing my lyrics/melodies to fit within a finished chord progression or entire instrumental arrangement (the knots were already tied). Now, when I find a nice guitar hook, I stop (tie that knot) and immediately try to dig out the emotion of the hook (soft rope, iron cable, hose, whatever). Translate that emotion to a real or imagined experience, then start writing the story (lyric/melody). Then I write the instrumental arrangement to fit the lyrics (tie different knots to fit the story without changing the material tone). This allows your lyrics to develop freely with more available vocabulary. You may also find yourself being more creative in the instrumental development as well.
I once thought a "Sweeping Arpeggio" was an Italian janitor.