What can I do to prep for the SAT?

I'm really kicking myself, because I'm going to be a senior this upcoming year, and I still haven't taken the SAT. :/ I took the PSAT in October of my junior year, but I only scored around a 1650 (that was with very little prep though). I definitely plan on getting an SAT prep book and doing a ton of practice tests, but is there anything else that I can do to help myself prepare?