Video: SSDs are a clearly superior drive format, but they're more expensive per gigabyte than their platter-based hard disk drives. The natural middle ground is to get an SSD for your Windows installation and an HDD for all your stuff. This video shows you how to setup both to make them work well together. The video from Linus Tech Tips shows you how to tweak your Windows libraries like Documents and Pictures so they save photos to your HDD rather than your SSD. It also suggests installing things like Steam on your HDD by default, rather than trying to manage your game installations individually. For power users, some of this info might be a little old hat, but if you're finally switching to an SSD for the first time, this is a handy tutorial on getting everything setup and working smoothly.
How To: Optimise your SSD+HDD setup [LinusTechTips]