I know the standard advice is "enjoy your last summer before grad school" but I'm definitely going to be reviewing before classes start since I've been out of undergrad for two years and my school's economics major wasn't very rigorous.
I've been working through a calculus book (Kline) to sharpen up basic skills, and was planning to do the same for linear algebra. I have Simon and Blume "Mathematics for Economists" that I bought at the recommendation of a professor and want to work through as well. Is this a good plan? Anyone have other recommendations?