Much of the important data is produced dynamically and needs to be backed up regularly at the source. Another important consideration is the physical and electronic security of your server. At a minimum, the server where your site will be hosted should be in a physically secure location, protected against unauthorized access. Most large ISP's have installed mag card systems like those used in secure corporate offices. This ensures that only authorized personnel have physical access to machines.
Electronic security is just as important.
The server should have a secure system of password access and be protected by an electronic firewall system. Your site should be as safe as possible from hacker attacks. Protection Disaster protection features are what separate the top-tier web host providers from the rest. It costs a lot of money to install these features, but in the event that a disaster occurs, the price is well worth it. Find out what sort of fire protection system is in place.