So much goes into college football recruiting, when in reality the process could be so much simpler. Just open the school's media guide, turn to the page that lists all of the NFL draft picks that have played there, say "you could be next" and then wait for the commitment.
It shouldn't be a surprise that the college teams who recruit the best also happen to be the ones that have their names mentioned most often during the NFL draft. While it's not a given that a top high school or junior college prospect will end up getting to the pros, the schools that land those top recruits also tend to be the best at developing players of any talent level into NFL prospects.