I have done many Angel Flights in my '83 J. Here's what I do to ensure an acceptable mission:
1) does weight and balance work for the flight. Many customers will be quite large. I tended to ignore missions that comprised 2 passengers unless they had a combined reasonable weight.
2) are they capable of getting up and into the plane, ask when you schedule with them. Most will need some help as getting up on the wing can be tough, help them and let them know not to step on the flap.
3) ask what they are bringing, dont get surprised when you pick them up and they show up with something that wont fit in the plane, ie wheel chair.
4) many have a hard time finding where to meet at airports, make sure they know where to go to get picked up.
5) only happened to me once in the 50 flights that I have done but be prepared for air sickness, I always had a couple old bath towls and a plastic show box available.
6) if you have a buddy that likes to fly with you have him or her come along as a mission assistant. I do this most of the time and it usually limits the flight a single passenger flights because of weight.
7) lastly let them know when you schedule that the flight is in a small plane and is weather dependent, dont be afraid to cancel if the weather doesnt cooperate.
Angel Flights are a good way to put purpose into our flying, give it a try and see how it works.
Gerry