Though the duties of a job of a waitress are huge, the salary is not. However, the major earning comes from the tips that the guests give for good service. Nowadays, there are several hotel management schools which offer students not only practical training for this job, but also a certificate after successful completion of a service related course. Such courses can help you in getting a job in some popular and busier restaurants too. Always remember, customer satisfaction is the key to success in the service industry.