It's actually really easy and all you need is paper towel and a plastic baggie or air tight container. Last week when I was cleaning my oven I found some bay leaves I had dried in my lower oven a few months ago and totally forgot about. I wouldn't have forgotten them had I used the microwave. And now they're useless, damn it! Oh and using the microwave for 3 minutes uses much less power than having your oven going for 4 hours.
Here's the full article via tipnut.com:
How to Dry Herbs With a Microwave