Check before updating to new version:

Templates
Check template files for any duplicates

Modules & Plugins
Check extension manager for updating modules installed on server.

Superfish

Files/Folders on the server to keep:
public_html/cgi-bin?
public_html/404.shtml
public_html/robots.txt
public_html/system/config/langconfig
public_html/system/config/localconfig

Main Column Image Width:
Stand alone image width: 640
Inside article width: 610