Courtesy of: Recruiting-101.com
10.) Do poorly in school There is little doubt that doing poorly in school will scare many schools away. Not putting much time into your school work and struggling early on usually creates a hole that is very hard to get out of.
9.) Talking back to officials/refs/umpires College coaches want to find athletes who just play and not have an ongoing sideshow with an athlete. The more you focus on succeeding in the game, the better of you will be.
8.) Get in trouble off of the field/court/diamond With the amount of publicity that athletes get for off the field problems, the last thing you want to do in high school is get in trouble. When there is less supervision, watch out because more trouble can be had.
7.) Treat your teammates bad Why would a college coach want to recruit an 18-year who thinks that they are better than their teammates? I can promise you that coaches will watch your demeanor in all phases of the game if they are considering you.
6.) Disrespect your parents I read an article a while back about a coach who had an in home visit with an athlete and he moved on as soon as he heard the athlete talk to his parents. Treating your parents poorly is a huge sign of disrespect towards those around you.