Personally, before my SSD failed(gotta take it back for warranty), but I used mine for a boot drive, and load things like my web browsers, office programs on it. But install steam and games, apps on your hard drive. In fact, if you go into your profile, and right click on a folder and click properties, look for a tab that says location. You can actually change where Windows stores your files like your documents, music, pics etc. I recommend making those folders up somewhere on your hard drive and mapping your profile folders to it, that way you get the fast boot and loading, but you save max amount of space on the SSD.
Honestly with Windows 8, I don't notice much difference in boot times between my SSD and a mechanical 250gb hard drive that I tossed in as a boot drive just to get by with.