Power Supplies?

Hi,
Do any of you guys know about power supplies? I haven’t really touched computer hardware in a while, and I’m finding myself at 0s again.

I have 3 hard disks and a CD-RW right now, which completely takes up all of my power cables. I’d like to power other stuff as well, such as my case fan and the case lights. Are there power supplies out there with at least 6 power cables? I’ve been looking online, and I also don’t know which kind to get, I don’t really understand the specifications. Can any one help me out?

Thanks