Like pretty much everyone else out there, I love Khan Academy like whoa.
So much that I occasionally go on jags of PRACTICING MY MATH SKILLS, which is TOTALLY OUT OF CHARACTER. But for whatever reason, KA makes it fun, and I find Sal's videos to be both helpful and weirdly soothing.
Anyway, they've partnered with the College Board and created a whole new section devoted to the dreaded SAT. So that's rad.
Relatedly, mental_floss recently posted some excerpts from the very first SAT.