I ordered a new hosting server (upgrade), and I'm asking for your advices regarding how to migrate from the old to the new server, what and which configs files, exactly i have to be aware of in the migration process ?, user directories, any configuration files i have to be aware to migrate it ?, what about the exim mail server settings, the accounts mail inboxes contents and the Apache settings ?, please inform me with the best and well known ways regarding the migration to be successfully done