...You always want to market your shows to the moms...since they're the ones planning the parties and they'll talk with their friends about the party....Word of mouth will spread about you and how "charming" you were. Works tremendously well.
That sounds stupid but it is NOT!!! That is one of the better pieces of advice given here. Over half of my parties are from the mothers that either were at the party and saw me, or were told about me from the clients.
Women TALK! They will tell the truth about your show to their friends. If they like you, you have a career started right now, if they don't like you, no matter how good your magic is, they will crucify you to their friends.
Be charming, be nice to the kiddies and to the moms, charge what the market will bear (don't undercut price) and you will be successful.