One of the best "lifesaving" features is actually free. Adrian Banner recorded his entire lecture series, which follows the book chapter-by-chapter. These are available for free on YouTube and the Princeton website, serving as a perfect multimedia companion to the text. How to Use the Book to Ace Your Exams
Banner’s writing is engaging, but calculus is not a passive activity. As you read each section in the PDF, keep a notebook open. Re-derive every example on your own before looking at his solution. the calculus lifesaver pdf