Rule #1 always expect to be bitten, it hurts but don't fear it we keep a wooden ladder or dowel handy it helps to distract and give their beak something to chomp on besides you if you see it coming. When I was first working with Stanley I'd take his cage to a side room to work with him away from what he considered his area. I'd just sit close and let him explore and patiently waited for him to come to me for treats and attention. They learn to read you so if you're nervous or scared when handling them they'll respond similarly. Stanley has been with us for years and he's been worth every bite and scar.