I'm good at recognizing patterns. Be consistent - if I get a treat after every time I get my medicine, I'll take my medicine without complaint.

I don't like change, I like familiarity. If someone else is going to take care of me for a while, introduce us. Let her pet me and give me a treat a few times, and I'll know who she is and not hide from her.

(This list is going to get really long... but then, cat are complex creatures!)