Hi,
I just did one of these live today. I will assume that you moved or copied your files to the root.

On the hosts I use, generally all I have to change is this in htaccess...
RewriteBase /staging/
... to this...
RewriteBase /
...If I’m moving to the root.
And don’t forget that you have 2 spots in your config to change:
Tools, Configuration, File Manager, File Manager Path.
... and...
Tools, Configuration, Interface/Features, File Base Path.
Beyond that I don’t have to change anything else! The only other thing that occasionally comes up is if I have a hard-coded Base Href in my templates instead of the handy modx template variable of [(site_url)]
YMMV.
Hope that helps, Dave