What is titinium backup guys?
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You won't lose any data when you root unless you wipe cache/factory/data reset the device.
It you'll be using ODIN, you'll be flashing a .tar file and none of your apps and data will be affected.
TITANIUM BACKUP is
THE most awesome backup software IMO.
It features batch backup and restore, although for automatic restore WITHOUT having to get a prompt to install the app, use a cracked version.
In other words, root your device using ODIN, after rooting install TITANIUM BACKUP PRO (get the .apk from mobilism or someplace else). Backup your settings , apps etc afterwards.
If you want to backup before, I think STOCK RECOVERY gives you the option for nandroid backup(?).