Training: If you have received formal training in cooking, you can command a better salary.
Experience: The more experienced you are, the better the chances of improving your salary. However, your experience should be reflected into the food you cook. Your experience should result into making tastier or more varied food.
Previous employer reference: Your previous employer’s reference helps build trust and helps you generate more options.
Be reliable: If you are consistent and professional i.e. you inform in advance if you are taking leaves and you report to work on time, you will have a better chance of getting an increased salary.