So download (or build) your workbook. Print the sections that challenge you. Fill the margins with corrections. And watch as triple integrals and curl calculations transform from obstacles into tools.
Attempt the first 3 problems of a new section without any notes. Identify exactly where you make mistakes (algebra? trigonometric identities? forgetting the chain rule?). So download (or build) your workbook
Keep a notebook page titled "My Multivariable Mistakes." Every time you get a problem wrong, write: (1) Problem type, (2) Your wrong step, (3) Correct step. This builds pattern recognition. write: (1) Problem type