Hardware :: Using Monitor And Printer Calibration?

I just got Aperture and, though I've been a pretty serious photographer for a few years now, I'm starting to get more into doing actual prints and messing with RAW and thus realizing how important color correction and calibrating is. I definitely realize my MBPs screen, my external monitor, and my printer are all out of sync with each other when it comes to this. The only problem is I really have to idea where to begin to fix this.

And before anybody even thinks the word "Search," I don't want to try to piece together random threads on calibration and attempt to figure it out; that's how lost I am.