Useful Links

SAT.

The College Board, including SAT Test Dates.
Bluebook, an app by The College Board that contains free practice PSATs and SATs.
More free SAT Practice from Khan Academy.
PWN the SAT, my preferred resource for SAT Math preparation.
The Critical Reader, the best source for SAT Reading & Writing preparation.

My specialty is tutoring. If you need expert advice on college admissions, please visit Nancy Benton at Admissions Edge or Steph Shea at Launch College Consultants.
Amy Brecount White is an experienced, skilled college essay consultant. If you're engaged in a vicious battle with your college essays, she's the cavalry to call in.
If you need help with math, then I recommend Rebecca Zook, an excellent online math tutor who is sincerely dedicated to her craft. She has a pretty neat education blog, too.
A handy list of colleges that "superscore" the SAT and/or ACT (i.e. they pick and choose your best subject scores from different tests to make your composite score). More colleges superscore the SAT than the ACT.
A list of test-optional schools, in case you want to opt out of standardized testing.
Khan Academy, a collection of easy-to-follow video tutorials on pretty much every subject under the sun.

The Big Test by Nicholas Lemann, the definitive account of the development of the standardized testing industry.
The Mismeasure of Man, an exposé by the late Stephen Jay Gould of the pseudo-science used through the ages to construct and measure "intelligence". A good book.