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Since excess moisture can cause a piece to explode in the high temperatures of a kiln, it's a good idea to pre-bake it in your kitchen oven. This will assist in the drying process in a gentle way, so that you can be confident of your greenware being absolutely bone dry when you put it into your kiln.
Just start it off at your oven's lowest temperature, and then add another fifty degrees every twenty minutes up to 350 degrees. Hold it at 350 for half an hour, then turn the oven off and let everything cool. Once it's cool enough not to burn you, you can transfer it directly into the kiln.