Two weeks ago I mentioned my search for a good tool to sync directories to backup important files from my XPS laptop to a network share. I've been using Cobian Backup for 2 weeks now and so far I have been pleased by the results.
I have configured it to do an incremental backup each day at 20:00. It makes a full backup every 5 days and it always keeps 2 full backups.
I have also specified to turn on the XPS LEDs using the xps_led_control executable when the backup starts and turn them back off again when the backup has finished. A nice visual reminder that my data is safe.