Math review

I’m a week away from starting school and I’m enrolled in multivariable calculus. I did well in Calc BC last year and scored a 5 on the AP exam, but now my brain is on vacation mode and I don’t remember some of the material from last year. My heart is set on taking multivariable calc in my first quarter, but I’m realizing I need some kind of review of BC or preview of multivariable calc. Does anyone know any basic multivariable calc principles that would make the first few weeks of this class easier for me?