What`s really going on here is you`ve not worked out your story.....it`s not that difficult thinking up little lines of verse that sound interesting....but they can sit there in your mind like an island,...isolated.
So ,if a chorus worthy verse hits you and you think it could be a good song,you need to build a story around it..
Also don`t be afraid to delete..maybe your idea isn`t as good as you imagine!
But i agree that going back after a break and looking with fresh eyes is beneficial.