Don't rush it man, I rushed my CSSA trial and thought I blazed it, so I sat still for like 30 minutes. I then tthought I'de check the paper and had 5 minutes to do a S.H.M question worth 5/6 marks or what ever it was, lucky that was pretty easy though.What. I'm going to speed through it and do everything a second time (if I can). Taking it slow just freaks me out... just in case there's a qn later that takes longer than expected, or a qn I can't do that I need to time to figure out, etc.
I find all my stupid mistakes if I do the question a second time so yeah (cover your first working and literally do it again -> low chance you'd mix up +/- signs twice...).