How should I go about locating a good teacher and how will I know if they're right for me?
Call a few. Ask them a bunch of questions, like:
1. What experience do you have?
2. Why should I go to you?
3. What can you teach me?
4. What styles do you teach?
5. What do you offer that other teachers might not?
6. Will you be able to show me how to harmonise synthetic modes in a baroque context? (Or whatever floats your boat). ;)
Rephrase these questions however you like, but I'd be asking something along those lines. Pay attention not just to the answers given, but also to how s/he answers, since the way they answer will reflect how they teach. So, if they don't seem to listen to you, or they ramble, or they seem like someone you wouldn't get along with, then you need to ask yourself if that's the kind of teacher you want (obviously, you don't, right?).