Always try to make sure that the babysitting request is serious and only accept it if you are really sure that you can handle it efficiently.
It is essential that you have the parents' telephone number at your disposal in order to immediately call them in an emergency situation.
Furthermore, it is advised that you know all the important emergency numbers, especially 112 (ambulance, fire department) and 113 (police).
Respect the ground rules of the family (rituals, eating habits, TV times, sleeping times, etc.) and individual medical characteristics.
Make sure to have planned a comfortable and exciting stay in order to facilitate your babysitting session. (e.g. movie night, board games, etc.)
Try to make sure to not let the children out of sight. You are paid to keep an eye on them, so that nothing happens to them, while you're there.
Do not spend all the time on the phone or do not invite any friends over. You can do both these things when you are not currently babysitting.
Always try to be open and friendly to children and parents, in order for them to approach you for another babysitting session in the future.