customized settings into v3?

 From:  Ronamodeler (RON_A)
6923.1 
OK, I am going to ask this for the benefit of newbies, and people like me with short memories. :-)

What is the most efficient way to transfer any shortcuts, customized lighting, UI changes, etc into the official new v3?
I typically figure out where about half of them are, and forget the rest.
Thanks forum!
Ron