Once they reach adolescents, peer groups begin playing a greater role in steering your child's self-esteem. The more positive their self-esteem was before adolescents, the easier it will be for them to resist negative peer group pressures. In general, the more positive the parents self-esteem, the more positive the child's will be. Be a good role model. Start by building your own self-esteem.
Honest praise is the quickest way to build a person's self-esteem.
Find someway to praise your child every day. Make sure the praise is realistic and honest. If need be, give your child a task you know can be completed just so you can give the praise. As your child's self-esteem grows more positive, this process will become easier and more natural. Focus on the positive aspects of your child's behavior.