You've gotten good advice thus far. Filing FAFSA and/or CSS Profile is a great start and the following websites give you additional resources.
There are sites that allow you to take surveys, earn points, and go lottery style for scholarships like the scholarshippoints.com website suggested.
Additionally, the Offices of Financial Aid of the institutions you applied to will have a website with scholarships and other opportunities available to its students. The clubs and organizations you're involved in at school (such as NHS, FFA, etc.) have scholarships available, and maybe? your high school counselor can help direct you.
There is a lot of information out there! Be judicious with your time and energy.