I have used the FlyAway Shuttle service going to and from Westwood and LAX two times since LAWA frist opened up their Westwood location. It's always easy and it always reduces stress and saves money not having to park at the airport.
Anyways, I am not exactly a 'regular' on the FlyAway; however, I have managed to use it enough to offer this very important tip: BRING EXACT CHANGE!
Twice I have lent money to people getting on the bus that did not have exact change and might have otherwise missed their bus and/or flight. I will gladly give a dollar or two to a complete stranger to save them the hassel of missing the shuttle; however, it just seems like a good habit to get into to find out the fare before hand and bring the correct amount of money. Just a thought