Welcome, Kevin, and congrats!
Gosh, it's such a loaded question you ask. I'm not sure there is one answer to it. I think we all want different things out of our bikes, so I don't think I can say there is something you absolutely must do to the Versys to make it right for you. That said, here's some stuff I've experienced or read that others have appreciated...
I know a lot of people in the 5'5" to 5'8" range like to put the lowering kit on. Others put gel seats, Corbin seats, etc. on but I haven't had an issue with the stock seat for my casual riding style.
I found mirror extenders to be a nice addition. Others will have a lot more advice to give, I'm sure. I mainly just wanted to say "hello!"