Quote Originally Posted by HDNitehawk
Does any one have advice how to get accurate WB in camera so you need no post processing?

Custom white balance using a gray card. Gray cards can be purchased at photographic retailers (like B&H, Adorama, etc). You take a picture of the [18%] gray card, and set your custom white balance to that picture. In a sense, you're telling your camera that the gray card is neutral, so it shifts the color spectrum on the following pictures as if to make that gray card picture the correct gray.