ddrueding
Fixture
If you have a desktop with an SSD, you NEED to have a traditional drive as well. Use it for backups, use it for your pagefile. Use it for hibernation. If you're using Windows 7 or anything *nix, put your home directory on it as well.
I'd change that to: If your desktop has one drive, you need a second drive to keep a backup. I don't see any of the other things you mentioned as a "need" or even with strong supporting evidence on modern SSDs with their high wear ratings.