I've used clonezilla for a complete copy of the hdd. I've use explorer to copy out my files and other simple apps like GoodSync and Syncback.
Most backup software makes a proprietary backup and over the years I've found non-proprietary solutions for free.
I need to backup my HP Pavilion before I can get the DVD Drive repaired. Has anyone used Clickfree C6 for backup, or have any recommendations for a really easy external hard drive for back up?