Phil Kiner does a very good job with one eye shooters. He will have you try different hold and look points and tape the lens on your off eye. After his clinic, you should have a pretty good idea of what works best for you.
Nora Ross does a very nice clinic also, she will teach you to use the methods that work for her. I have taken both and gained knowledge from both of them. I do think that Nora's method will probably work best for most one eye shooters.