If you aren't working out, try working out
I've noticed that on days I work out, I tend to get fewer questions wrong. I do not believe there is an alternative explanation for this. Perhaps I am calmer. Either way, if most of the questions you get wrong are because you're just not paying enough attention like it is for me, it's worth a shot. Worst case scenario, it probably won't decrease your score and it's good for you anyway.