You earn a scholarship.

Make really good grades. Have terrific credentials (membership in school clubs like honor societies and such and do volunteer work and internships). Get scholarships. Student loans have to be repaid. FREE means scholarships and that takes hard work well ahead of time.

Now as to scholarships, you could pick an under-represented musical instrument (like oboe, for example) and practically guarantee yourself a music scholarship if you're even half good on the instrument because there are never enough oboe players for all the school bands and orchestras.

Outstanding grades.
Athletic ability.
Military service.

1. get insanely good grades and test scores in HS and hope you can get some scholarships.
2. if you live in california, you can apply for cal grants (you dont need to pay them back)
3. get a athletic scholarship. if you are insanely good at a sport. you can get into the best colleges in the nation for free for playing a game.
4. join the marines or army. they pay for your college.

Become the janitor!

HA HA HA HA HA HA HA HA IF YOU HAVE TO ASK YOU ARE TO DUMB TO GO