When it comes to auditioning, an actor can never have too much insider information.  Determining the perfect way to audition is difficult because casting decisions are always the subjective opinion of the casting director.

Because of this it is important to develop your own craft and your own techniques.  If your child gets nervous, for example, help him/her develop breathing and relaxation/concentration techniques. If s/he has trouble remembering lines, practice memory techniques with your child.

Most importantly, remember that not landing a role may not have had anything to do with your acting ability.  Children In Film has an article in the Responsible Parenting section of the site regarding "Dealing with Rejection" and parent blogger, Carl Sprayberry, has also written on the subject.

One major way to up your chances at an audition is to make a great first impression.  Like with any interview, it is this first impression that will stick with the casting director.

Remember to use good manners - bad manners can be defined as those that are unkind or make another person feel uncomfortable.  Practice good manners as the parent and the child not only with the casting director, but also with everyone else at the casting office.

Master the art of a smile - a smile must be beautiful, but it must also have true meaning behind it.  Practice a genuine simile and if you're worried it won't be genuine, imagine something that makes you truly happy when you walk in the room.

Be Outgoing - an outgoing person is interested in other people and can show this by asking questions (when appropriate).  Additionally, an outgoing person does not gush over someone or spread gossip.  Never discuss casting room gossip with a casting director and don't gush over their accomplishments.

Listen - show with your face, your comments,  your actions and the questions you ask that you are truly listening.