First step is to ensure that you are on top of your own personal cleanliness. This includes keeping nails short, hair is covered, wash hands, and adhere to the restaurants policy on facial hair (either clean-shaven or well-kept beard).
Wear Clean Uniform
Make sure your uniform is always clean and is not carrying any bacteria or stains that could spread. This will avoid cross contamination. Also, you should make sure that your uniform is presentable. This means washed and ironed properly.
Wear Appropriate Footwear
You should ensure you are wearing clean footwear at all times. It may be a good idea to buy waterproof footwear so that you can wipe down and clean off any liquids or stains easily. After each shift, you should take the time to clean your shoes, ready for the following shift.
This may sound self-explanatory, but you may be surprised at just how many people forget basic manners and hygiene. You should avoid touching your hair, nose, and eyes in front of customers. If you sneeze or cough, be sure to catch it in a handkerchief, dispose of it, and wash your hands immediately.
Use Clean Equipment
Using clean equipment does not just mean ensuring that the kitchen utensils are cleaned thoroughly. This includes making sure that your notepad that you take orders on, is clean and free of any marks and stains. Be sure to mop up any spillages or slip hazards as soon as you notice them. Wipe down any tables after customers have left.