You have small, uncooperative veins. When you mention to the phlebotomist at the church's blood drive that you are difficult to stick, and she looks at you with a little bit of fear in her eyes and says, "we'll be fine", stop. Do not pass go. Do not say to yourself, "I'm sure the reason that she has her name written on a piece of tape stuck to her lab coat is due to forgetfulness, and not at all a sign of someone in her first week on the job."
No, what you shall do in the future is this:
1. politely stand next to the chair.
2. ask for the expert in the room, preferably someone who has taught phlebotomy to others in the past (that's a pretty good sign, in my experience)
3. refuse to let them tell you that it will probably be okay.
Trust me, it's not worth it to get stuck in two arms by two people to try to get one pint of blood, because you don't want to hurt the newbie's feelings. Better to just have someone do it right the first time.
P.S. Today's Red Cross hero was named Steve Stick. Remember that name-- and ask for him if he's there next time.
Note to others who might be reading this note to myself: I take much pride in the fact that my Grandma Bug was apparently often "the expert" in her years working for the Red Cross, with the blood mobile. I bet she would have gotten my my petite veins to cooperate on the first try. She had beautiful hands.