White Balance in Digital SLR Cameras

I own a Nikon D40X Digital SLR camera. In my last MWS meet, I learned a new technique to use white balance in DSLR to get some stunning photos.

I started experimenting with the white balance in my camera and here are the results.

Mumbai High Court
Mumbai High Court

The above picture was taken of Mumbai High Court with auto white balance in the camera.

Mumbai High Court
Mumbai High Court

The above picture was taken using custom white balance using blue/gray sky as the white balance.

As you can see, it produces quite a different and stunning picture. I would love to learn more of these techniques to improve my photography.

If you know any such tips and tricks please post it here.