To Label?

Now that my stock of brews is increasing from simple management (1 type or 2 with different caps) to 4 or more I'm thinking I need a more definitive tracking system. Or at least better than generally know whats in each brown box. Or better than a simple D or P on the bottle cap, as sometimes D and P can look a bit ambiguous, and while the simplicity of just using a number is okay, I'd rather go more elegant.

So I'm now considering making up labels. Any advice out there? Any tidbits of good knowledge? Better brands of labels for easy removal? Good design tricks? How do you, my fellow brewers manage your bottled collections????