Get the butter
According to Lifehacker, you can hermetically seal your cheese in butter, to keep it from going all moldy-like:
The key is to get the butter lightly spread on the cheese you aren’t serving yet, and to cover the end you exposed by cutting. It’s a tip backed up by both recent how-to articles and really, really old cookbooks. If you don’t like the idea of plebian butter infecting the taste of your aristocratic cheese choices, simply shave off the borders of your block before serving.
Interesting and useful. According to another really, really old cookbook I’ve never read, you can also protect your butter from spoiling by covering it with a thin layer of cheese.
