Waitressing is not an easy job as some might think. As I started my career serving tables here's a few tips:
1) Customer service. - "Customers come first"
This statement in most cases is true. The business you are in depends on customers. Businesses compete relying on reputation, without customers there is no business.
SMILE - Do you want to be served by an unhappy waitress? Leave your problems at home, because for 9 hours of the day, you are a professional!
BE POLITE - "P's and Q's" is something people remember. Today people walk round with heads down and it grates on my nerves when manners don't cost a thing. Thank your customers for placing their order.
BE HONEST - If you have over charged or someone has left a big tip, question it.
2) Food orders - "Run like hot cakes"
WRITE IT DOWN - When people place orders with you, there's nothing wrong with writing it down. A quick repeat to make sure the order is complete and heard so there are no mixed orders. Write on your note pad the table number or even the surname of the customer.
TEMPERATURE - Part of the training should be an awareness on food temperature. When food has been cooked through, it should sit under a heater to remain at a certain temperature (I think above 64oc) However, it is important that food is distributed to the right customer as soon as it has been cooked.
3) When you start to pour larger/beer in the glass, angle the glass straightaway at 45o to the pump. As soon as the liquid fills half the glass, move the glass upright. This way you will serve a nice glass of beer. If you have little "head" on the beer pull the level in short spurts.
4) YOUR PERSONAL HYGIENE
I know this sounds daft but be aware of your personal hygiene. Whilst this area can be laughed at and ignored, washing hands and tying back hair is important to prevent risks of contamination in food.