It depends what is the focus of your next course also, computations, theory, and/or applications to problems. Besides just practicing skills like taking derivatives of elementary functions, you should also review the definitions of concepts like the derivative, if you hope to appreciate the proof of the fundamental theorem of calculus, which is often presented in calc 2. The theoretical underpinning from calc 1 lies in the intermediate value theorem, the existence of closed interval maxima and minima for continuous functions, and Rolle's theorem and the mean value theorem, and their corollaries for the behavior of differentiable functions.
One way to study, if you already did well in your course, is to work through a different book on calc 1 from the one you used.