Personally, I did do a little light reading before nursing school, nothing to strenuous and tough. It is VERY true that you need enjoy your time before nursing school because it can take so much out of you. However a LITTLE evenly spaced and LIGHT reading can be beneficial. It can also make sure that you don't completely fall out of student mode during the gap to when you start school if you're not currently enrolled in classes.
I liked the Nursing Fundamentals Demystified to get me familiar with the basics. It really helped me.
My mom is a RN and I've been skimming through nursing books
since I was 9 or so. Plus I worked as a CNA, PRN, in a hospital float pool so that helped too. However, I don't advise starting a new job just before or in nursing school though, unless MAYBE you can get a flexible PRN job.
For someone who doesn't have the situation I have I or much healthcare experience, in general, I believe the Fundamentals of Nursing Demystified would be good "skimming" material prior to nursing school and that series is really helpful in nursing school too! Especially the med-Surg one!
Again don't overly exert yourself in a lot of studying or reading, nursing school will do that enough. I did the aforementioned and will be graduating in 25 days from nursing school!!!!