There should not be that much confusion when it comes to catching a shuttle bus in an airport. Usually airport personnel are fairly helpful and there are usually signs pointing you in the right direction as well. Once you find the location for the shuttle bus there are usually airport shuttle staff on hand to help you board the shuttle, store your luggage, process any ticket payments and answer most commonly asked questions.
Every shuttle bus company is different. Some operate curbside only and others have big shiny counters. No matter how you pay you are usually entered into some kind of system that tells you where you will be routed along with a receipt, which is actually your ticket. If you need a receipt for tax purposes you may need to get a separate receipt from a teller at a counter inside the airport.
One drawback of airport shuttles is that some companies do not release one unless there are enough passengers to fill a bus. This means that you have to wait for some time before a shuttle is released from the shuttle companyís lot to pick up a full set of passengers. On the other hand if the airport is busy you benefit from this way of doing business as a packed curbside can mean that the shuttle company is providing back-to-back bus service or shuttle bus service every five minutes.