If you don't mind my asking, how old are you? The only reason I ask, is I know that I get grants out the a$$ and I have never even asked for one! The only thing I did was fill out my FAFSA at the fafsa.gov website. The fact that I am >23 years old (actually, >>23 is more appropriate

) gets me *a lot* more aid then if you are less than 23. For some reason, the US government does not consider you to be independent until you are over 23.
I get a couple of grants from the government and a couple from my school. Some are based solely on my income (or lack thereof) like the Pell grant and most of the others are based on my academic performance. All in all they pay for ~60-70% of my tuition, perhaps even more. Between grants, which you keep, and loans, which you have to pay back, my tuition is covered.
Start with your fafsa application. And also consider starting your 1st two years at a community college (do your research though to make sure ALL or almost all of your credits will transfer). I saved about $70k going that route and have no regrets about my community college.