When you babysit, parents are entrusting you with thier children’s lives. Your most important responsibility is to care of the children’s needs and keep them safe. This means that parents look for certain things in a babysitter:

Maturity
Trustworthy
Patience
Attentiveness
Safety-conciousness
Ability to keep rules for kids.
Fun
Great preperation
Being on time(early is even better)

If you feel you have many of these qualities and have permission from your parents, you are ready to move forward into the world of babysitting!