When I got Socrates he barely knew how to step up, but over the last 7 months I have spent a minimum of two hours every day training and spending time with him. That also helped us bond, and now he has at the point if you were to put him on the floor and let him pick which person to go to, he comes straight to me.
I do a lot of trick training with him, he knows how to wave, turn around, ring a bell, give kisses and such.
It's funny (or at least ironic) to me that you're working with an Amazon, as I am working with my neighbors 30 year old yellow naped Amazon. In my experience with him, and I wasn't very good with Amazons until I discovered he lived next door, Amazons are a bird that has to trust/like you. What kind of things are you looking to improve with yours?
On another note I also am working with our new African Grey, (45+ years old) he didn't like me much at first, but one common factor that I've found when it came to bonding with him was food, and time. It worked with the Amazon too. Though it took me about 6 months for him to fully trust me.
If you have something specific that your curious about, just ask. My experience ranges pretty far now days.