Former high school counselor and continuing fellow inhaler of college admissions information, Cyndy, sent me this site.
I haven't tried it myself, but Cyndy has found it to be an "amazing resource" that she wishes was available when she was still counseling kids.
And I've recommended the book Paying for College Without Going Broke here before. The 2011 version has now been released and there are a few disappointed reviewers on amazon.com who noticed that the book no longer includes the worksheets for calculating your EFC (Expected Family Contribution) using the institutional methodology. I suspect this was due to in part to the protracted publishing process–maybe the newest information wasn't available when the book went to print?I'd still recommend the book as one of the best guides to understanding how financial aid really works.
And to calculate the EFC using the IM, just go here (finaid.org is my other favorite financial aid resource).