Common commands to standardize user and group, as well as permissions for directories and files:

Update user/group:
chown -R username public_html/
chgrp -R groupname public_html/

Add a backslash before the semicolon on the following commands:

Change directory permissions rwxr-xr-x:
find . -type d -exec chmod 755 {} ;

Change file permissions rw-r--r--:
find . -type f -exec chmod 644 {} ;