To Catbyte :
Thanks a lot for your C&C, it really encourages me a lot. Here is the information about the photo that you asked.
170 Color of A Cloudy Sunset 05 (Marina Bay, Singapore, 2009)
Exif Data
Exposure: 0.008 sec (1/125)
Aperture: f/11.0
Focal Length: 35 mm
ISO Speed: 100
Exposure Bias: 0 EV
Flash: Off, Did not fire
Exposure Mode: Manual
White Balance: Manual
Metering Mode: Center-weighted average
Light Source: Daylight
Contrast: Low
Saturation: Low
Sharpness: Soft
Compression: JPEG (old-style)
Color Space: sRGB
And at Editing (PP/ Post Production) using Adobe Photoshop CS 2, I used some enhancing tool :
Image>Adjustment>Brightness (-5) & Contrast (+5)
Image>Auto Contrast
Image>Match Color (I forgot the exact number of it, i turned on /activated the Neutralize then gave a lower level for luminance, color intensity and fade)
After that I did the masking editing with three layers (all using curve tool)which were sky layer (with deep S shape curve), buildings + water layer (using shallow S shape curve) and water layer ((with deep S shape curve)
Then I continued with
Image>Auto Contrast
Image>Auto Level
Image>Hue/Saturation >Hue constant at 0 Level, Saturation (-5). Lightness (-3)
You can also try the other editing that might be also can work for this type of photo to enhance the skys tone. I thinks other friends at Clubsnap forum have their own favorite editing way for this purposed.
When I took this photo, I used ND Grad 4 t block the brightness of the sky. It is easier to get more dramatic for the sky at the afternoon (note : the sky is still available at lower postion is better, not until the sun is totally gone), when the sun not to high (near the horizon) so the higher part of sky can become darker (after using ND Grade) while the horizon sky (lower part) still remain bright. I also set the camera with Dynamic Range Optimizer (at Sony camera it called as DRO) at +1 to make the buildings not totally dark because of back light (from the sun). Hopefully this short description will can give you the information that you want to know pardon me if there is something not so ideal. Have a nice shooting time and hopefully you can get the best result based on what you want, cheer ;p