Zolty, Brother P-Touch is how it's done. They're expensive, but they're worth it. I've used other labelling systems and they're just not as good.
Costco and Sams have starter kits with a mid-range unit, batteries, and a few tapes. Great deal.
Staples and Office Depot carry the various TZ tapes. You'll want to stock up on an assortment. In particular, you need black on white, white on black, and black on clear, and then maybe at least one bold/annoying combo like black on yellow.
Watch out for the cheap baby Brother system, get the real P-Touch with real TZ tapes. They have some lower end line that's cheaper initially but more expensive in the long run.