If your machine supports it you may want to try out Intel SRT with a drive this small. Either that or make your boot drive the spinning disk and just install the few things that you want to be really quick on the SSD. I really didn't notice all that much of a difference between SRT and booting off of an SSD in day to day use anyway.
For instance, if it takes you 20 seconds to boot, and 10 seconds to load a level in your favorite game, and 20 seconds to load Photoshop . . . Moving to the SSD will have about half the time off any of these things.
Considering you probably restart once or twice a day, booting off of the SSD will save you 10-20 seconds a day. So do you launch Photoshop more than twice a day, or load a level in a game more than 4 times a day?
On the spinning disk run software like Perfect Disk or Ultimate Defrag to move unused data out of the way.