1.First you need to be honest with yourself and decide what division of college football you think or your high school coach thinks you can play at.
2. Based on that you need to get a highlight tape and send it to schools that correlate with your level of talent; though you can send it all over if you want. I would advise not only sending a highlight tape but also game film as well, coaches look at that a lot more; and be sure it is one of your better games.
3. Over the summer you need to go to some football camps, they have them at schools all over the county and you really need to go and show your abilities. If you send out your film and you start getting letters of interest try and find out if those schools have camps you can go to.
4. Work extremely hard over the off-season and have a monster senior season, stay in contact with the schools that are showing any interest and make sure your coach is staying active in trying to find a home for you for the next four years. If your coach will take the time to help promote you it will help a lot!!!!
Good luck!