Cultivating Your Writing Process

Again, my weekend was not as productive as I had hoped it would be. After fighting with sinus headaches for most of Saturday and Sunday, I ran into a scene during my editing sessions which reads clunky and rough compared to previous scenes. I know this is the type of writing I produce when following the advice of "just get it written and fix it later," and now I am stuck in a position I hate when it comes to writing. I find myself asking if the current text is worth salvaging or if I should simply start over from scratch. Which will be easier? Which will be more time efficient? Which will get me to a point of being happy with the quality of the scene? This dilemma is why I prefer to address quality during my drafting process. Why write something I know will never make the final cut?