2: appropriate enthusiasm, so that customers have a sense of respect, everyone wants to be respected, everyone wants to be valued. But don't be too enthusiastic, it's easy to make the guests resentful.
3: active service, when you see the guests have any inconvenience, you should take the initiative to consult, whether you need service. It also depends on what kind of situation.
4: Instrumentation, dress must be neat, simple, do not wear heavy makeup.
5: learn to listen, learn to watch the guests (this is a high technical content). Learn to be patient.
The above is only a personal opinion, I hope to provide you with some help.