The Institute for Humane Studies has a great program of scholarships, grants, seminars, college guides, and much more to help students at both the undergraduate and graduate level. The deadline for the prestigious Humane Studies Fellowships is December 31. The application and full details can be downloaded. (They also have a small but useful set of links for high school students.)
P.S. From high scholarship to street activism: the BureauCrash site is also worth a visit.
As a graduate of many IHS programs and a former recipient of the Humane Studies Fellowship, let me second Dr. Palmer’s endorsement. The Institute for Humane Studies is an amazing help to students, faculty, and others (like me). Also, Dr. Palmer is one of their finest speakers!