The FAFSA (Free Application for Student Aid) is required by many scholarships to determine need.
The FAFSA can be found online at http://www.fafsa.ed.gov/
Information about filling out the FAFSA on the web: http://studentaid.ed.gov/PORTALSWebApp/students/english/fafsa.jsp
Information about completing the FAFSA can be found here, including the PDF versions of the Dept. of Education's Completing the FAFSA, 2008-2009 and Completing the FAFSA, 2009-2010: http://studentaid.ed.gov/students/publications/completing_fafsa/index.html
Kiplinger's Personal Finance Magazine web site has a great article entitled, "11 Student-Aid Traps to Avoid," which would make for timely reading: http://www.kiplinger.com/features/archives/2009/01/avoid-student-aid-traps.html
There is a comment in the reader's comments by Mark Kantrowitz, author of FastWeb College Gold: The Step-By-Step Guide to Paying for College and FinAid, The SmartStudent Guide to Financial Aid, one of the best free resources for college financial information on the Internet (http://www.finaid.org/). Pay attention to that comment.