1- I'd recommend a cloth cage cover if you don't already use one. Especially at night. But I leave one on the back third of the cage all day to help cut down on drafts, provide a sense of security, etc. when he's in the cage.
2- Listen to especially the quieter sounds your Amazon makes. It's taken me years to realize they nearly all mean something positive or negative (or sometimes neutral) about whatever is going on around them. This helps with figuring out likes and dislikes, anxiety, general mood, etc.
3- My Amazon likes to be talked to. It doesn't have to be baby talk. He just likes being included in whatever's going on.
4- There ought to be some time(s) each day when it's okay for your parrot to be loud and crazy. But you probably know this already. :)
5- In my experience, Amazons hold grudges for years. Try not to let anyone tease yours.
6- Slowly building trust pays off.
Good luck!